Question

1. A women pulls on one end of a rope, rhe other end of which is attached to a large box. The large box, however, does not move. The free body diagram for the box should include

A.a force by the rope, B.a force by the women, C.both a force by the rope and a force by the woman ,D.neither a force by the rope nor a force by the woman

2.The strength of gravity on the Moon is only 1/6th that on Earth. If an astronaut has a mass of 90 kg on earth, what would her mass be on the Moon?
a. 540 kg, b. 90 kg, c. 15 kg, d. 6kg

3. Two skydivers of identical weight are in freefall at terminal speed. The first skydiver has a baggy suit and descends at a speed of 150 mph. The second skydiver has a skintight suit and descends at a speed of 200 mph. The magnitude of the force of air resistance on the second skydiver is

a. greater than that on the first skydiver.

b. less than that on the first skydiver.
c. equal to that on the first skydiver.
d. there is not enough information to deteremine this

4.if a body is acted on by a force of 10 N and moves in a straight line with constant speed, we have to assume

a.nothing. That's what should happen.

b.that its inertia is too large for it to speed up.
c.that the net force acting on the body is zero.

d.that the surface the object sits on must have very low friction.

5.You push on a large crate with a horizontal force of 25 N and it moves with constant speed across a concrete floor. If you were to push the same crate on the same floor with a force of 50 N, the crate would

a. move with a constant speed twice as great as before.
b. move with the same constant speed as before.

c. move with increasing speed.
d. the mass of the crate must be known in order to answer.

Answer 1

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