I can't figure out these couple questions. Help please?

1. Which statement about the concept of work,

as defined by physics, is false?

1. No work is done by a force if the object

moves in a direction perpendicular to the

direction along which the force acts.

2. All of the statements are true; none is

false.

3. No work is done by a force if the object

on which the force is acting does not move.

4. No work is done by a force on an object

that moves with constant velocity, where the

velocity does not have a component along the

direction of the force.

5. A given force acting on an object may or

may not be doing work.

I know that 1 is true but I don't know much else.

2.Moe is carrying and supporting a large crate by exerting 1000 N. He is walking at constant velocity across a level, horizontal floor.

If he covers a distance of 10 meters, how much work does he do on the crate?

Use g = 10m/s2

if needed. Ignore friction

between Moe and the crate.

1. 100 Joules

2. Moe did no work on the crate.

3. We need the speed of the crate, which is not given.

4. 1,000 Joules

5. 10,000 Joules

Any help is appreciated. THANK YOU.