Relation of Speed and Energy
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4th Grade Science › Relation of Speed and Energy
Which of these has the most speed and energy?
A cat resting in the windowsill
A car parked in the driveway
A motorcycle driving down the road
A teddy bear sitting at a tea party
Explanation
An inference can be made that the higher something’s speed is, the more energy it has. Higher amounts of energy will result in a more significant change of motion for the object it is acting on. When the speed decreases, the distance the object moves also decreases. There is a direct relationship between speed and energy. A motorcycle driving down the road has the most speed and energy.
Peter sets up his toy train on the railroad tracks he has in a straight line. He has a tool to measure the speed the train is traveling in centimeters/second when he pushes it to go. He set a box at the end of the ramp for the train to crash into. He measures in centimeters how far the train pushes the box and records the data in a table.
What is Peter investigating in this experiment?
How the distance a box moved would change as the speed of a toy train increased or decreased.
How the speed a box moved would change as the speed of a toy train increased or decreased.
How the speed a box moved would change as the distance of a toy train increased or decreased.
There is no way to tell what Peter is testing.
Explanation
Peter’s investigation was testing how the distance a box moved would change as the speed of a toy train increased or decreased. The pattern within the data table shows that the higher the rate of the train, the further the box moved. An inference can be made that the higher something’s speed is, the more energy it has. Higher amounts of energy will result in a more significant change of motion for the object it is acting on. When the speed decreases, the distance the box moves also decreases. There is a direct relationship between speed and energy. So if he were to increase the speed of the train, the box would move a longer distance.
Peter sets up his toy train on the railroad tracks he has in a straight line. He has a tool to measure the speed the train is traveling in centimeters/second when he pushes it to go. He set a box at the end of the ramp for the train to crash into. He measures in centimeters how far the train pushes the box and records the data in a table.
What is Peter investigating in this experiment?
How the distance a box moved would change as the speed of a toy train increased or decreased.
How the speed a box moved would change as the speed of a toy train increased or decreased.
How the speed a box moved would change as the distance of a toy train increased or decreased.
There is no way to tell what Peter is testing.
Explanation
Peter’s investigation was testing how the distance a box moved would change as the speed of a toy train increased or decreased. The pattern within the data table shows that the higher the rate of the train, the further the box moved. An inference can be made that the higher something’s speed is, the more energy it has. Higher amounts of energy will result in a more significant change of motion for the object it is acting on. When the speed decreases, the distance the box moves also decreases. There is a direct relationship between speed and energy. So if he were to increase the speed of the train, the box would move a longer distance.
Which of these has the most speed and energy?
A cat resting in the windowsill
A car parked in the driveway
A motorcycle driving down the road
A teddy bear sitting at a tea party
Explanation
An inference can be made that the higher something’s speed is, the more energy it has. Higher amounts of energy will result in a more significant change of motion for the object it is acting on. When the speed decreases, the distance the object moves also decreases. There is a direct relationship between speed and energy. A motorcycle driving down the road has the most speed and energy.
Mihika and Craig are racing cars down different sloped ramps. Mihika's car traveled down Slope A and Craig's traveled down Slope B. Mihika's car traveled further than Craig's. Craig wants to beat her in the next trial. What can he do to his ramp to make his car travel further?
Craig can raise his ramp to make it steeper.
Craig can lower his ramp to make it more shallow.
Craig can raise his ramp to make it more shallow.
Craig can lower his ramp to make it steeper.
Explanation
Mihika's car traveled further than Craig's because her ramp was steeper. This allowed her car to gain more speed and gravity to have more of a pull on the vehicle. More energy and speed will enable the car to travel faster and further. If Craig makes his ramp steeper, he will have a chance of beating Mihika in the next trial. In theory, if his ramp is steeper than Mihika's, he should be able to gain more speed and more energy so the car will travel further.
A pencil is on a teacher's desk.
Why does the pencil remain motionless and NOT fall to the ground?
The pencil has no forces acting upon it when it is at rest.
The pencil only has the upward force of the desk exerting on it.
The forces applied to the pencil are too strong to allow the pencil to move.
The desk exerts a force equal to the force of gravity but applied in the opposite direction.
Explanation
An inference can be made that the higher something’s speed is, the more energy it has. Higher amounts of energy will result in a more significant change of motion for the object it is acting on. When the speed decreases, the distance the object moves also decreases. There is a direct relationship between speed and energy. In this case, the pencil has no speed or kinetic energy of its own; the desk is exerting force upwards while gravity is exerting force downwards in equal amounts, so there is no change in motion for the pencil.
Mihika and Craig are racing cars down different sloped ramps. Mihika's car traveled down Slope A and Craig's traveled down Slope B. Mihika's car traveled further than Craig's. Craig wants to beat her in the next trial. What can he do to his ramp to make his car travel further?
Craig can raise his ramp to make it steeper.
Craig can lower his ramp to make it more shallow.
Craig can raise his ramp to make it more shallow.
Craig can lower his ramp to make it steeper.
Explanation
Mihika's car traveled further than Craig's because her ramp was steeper. This allowed her car to gain more speed and gravity to have more of a pull on the vehicle. More energy and speed will enable the car to travel faster and further. If Craig makes his ramp steeper, he will have a chance of beating Mihika in the next trial. In theory, if his ramp is steeper than Mihika's, he should be able to gain more speed and more energy so the car will travel further.
A pencil is on a teacher's desk.
Why does the pencil remain motionless and NOT fall to the ground?
The pencil has no forces acting upon it when it is at rest.
The pencil only has the upward force of the desk exerting on it.
The forces applied to the pencil are too strong to allow the pencil to move.
The desk exerts a force equal to the force of gravity but applied in the opposite direction.
Explanation
An inference can be made that the higher something’s speed is, the more energy it has. Higher amounts of energy will result in a more significant change of motion for the object it is acting on. When the speed decreases, the distance the object moves also decreases. There is a direct relationship between speed and energy. In this case, the pencil has no speed or kinetic energy of its own; the desk is exerting force upwards while gravity is exerting force downwards in equal amounts, so there is no change in motion for the pencil.
Peter sets up his toy train on the railroad tracks he has in a straight line. He has a tool to measure the speed the train is traveling in centimeters/second when he pushes it to go. He set a box at the end of the ramp for the train to crash into. He measures in centimeters how far the train pushes the box and records the data in a table.
What would happen to the distance the box moves if the train increases in speed?
The box would move a longer distance.
The box would move a shorter distance.
The box would move the same distance as a train moving at 70 cm/s.
The box would move the same distance as a train moving at 30 cm/s.
Explanation
Peter’s investigation was testing how the distance a box moved would change as the speed of a toy train increased or decreased. The pattern within the data table shows that the higher the rate of the train, the further the box moved. An inference can be made that the higher something’s speed is, the more energy it has. Higher amounts of energy will result in a more significant change of motion for the object it is acting on. When the speed decreases, the distance the box moves also decreases. There is a direct relationship between speed and energy. So if he were to increase the speed of the train, the box would move a longer distance.
Katie and Gordon were experimenting with two bowling balls. One of the bowling balls had a mass of 6 kilograms, and the other had a mass of 4 kilograms. They compared the force needed to roll each of the balls at the same speed. They also compared how much force it took to stop the balls when the balls were rolling at the same speed.
Which conclusion did the students MOST likely arrive at after experimenting with both bowling balls?
Both bowling balls were equally hard to roll at the same speed, but the bowling ball with more mass was easier to stop.
The bowling ball with the smaller mass was easier to roll and easier to stop than the bowling ball with more mass.
The bowling ball with more mass was harder to roll but easier to stop than the bowling ball with the smaller mass.
Both bowling balls were equally hard to roll at the same speed, but the bowling ball with the smaller mass was easier to stop.
Explanation
Gordon and Katie most likely concluded that the bowling ball with the smaller mass was easiest to roll and stop than the ball with more mass. The smaller bowling ball would require less force to move and stop because it has less mass. The greater the mass, the more force is needed to make a change in motion.