if two equal forces and opposite act on a single body moving at a constant speed

Question

• if two equal forces and opposite act on a single body moving at a constant speed, the body will_________

1. accelerate
2. come to rest
3. keep moving at the same speed
4. cannot say for sure

• A net force that acts perpendicular to the direction of motion will________

1. Increase the speed of the object
2. Decrease the velocity of the object
3. Have no effect on the speed
4. Have no effect on the velocity of the object

• In order for work to be done, there must be ________

1. Movement
2. Movement and a net force perpendicular to the motion
3. Movement and a net force in the direction of the motion
4. Zero net force

• If the speed of an object increases from 5m/s to 10 m/s, the kinetic energy has __________

1. Doubled
2. Tripled
3. Quadrupled

• If the speed of an automobile is doubled, the amount of work by the brakes to stop is________

1. Doubled
2. Tripled
3. Quadrupled
4. Halved
5. Can

Explanation / Answer

keep moving at the same speed Have no effect on the velocity of the object Movement Quadrupled Halved Halved Be half Just the break

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