Physics

In which of the following incidents is work being done?
A. A rock falling to the ground
b. A muscle man (Tyler) holding a cheerleader above his head.
c. A little boy pulling a red wagon along the ground.This answer is correct.
d. A rock sliding on frictionless ice at a constant speed.

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Terms in this set (15)

In which of the following incidents is work being done?
A. A rock falling to the ground
b. A muscle man (Tyler) holding a cheerleader above his head.
c. A little boy pulling a red wagon along the ground.This answer is correct.
d. A rock sliding on frictionless ice at a constant speed.

A. A rock falling to the ground
c. A little boy pulling a red wagon along the ground.This answer is correct.

Riding up a hill at a constant speed

potential energy

Riding on level ground at a constant speed

Riding on level ground while accelerating from rest

What is the advantage for a bicycle to be in gear 1?

Go up hills easier

At low speeds, what quantity is most important for a car in order to tow a large load?

What device can change the amount of mechanical advantage a car engine has?

What device disengages the engine (manual) from the gears in order to change from one gear to another?

Is it possible for a positive and a negative charge to attract each other?

Yes, they always attract

A glass rod is rubbed with a piece of silk. During the process the glass rod acquires a positive charge and the silk acquires what?

A negative charge