# physics

posted by .

a. How much power is generated by a motor that lifts a 300.0 kg crate vertically 8.0 meters in 6.0 seconds?

b. If the crate is dropped on a large vertical spring that has a spring constant of 200,000 N/m, how far does it compress the spring?

• physics -

a.) P = (mgd)/t so just plug in and solve

b.) mgy(spring) + 1/2ky(spring) = mgy(crate)
y(spring) = mgy(crate) / (mg+1/2k) and now you can plug in again and solve

## Similar Questions

1. ### physics

a fork lift picks up a crate using 400 N. it moves the crate 20 meters in 50 seconds. how much power is used?
2. ### physics 3!! **

A man lifts a 3 kg crate from the floor to a shelf (2 m high) at constant speed*. What was the change in KE of the crate?
3. ### physics

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work?
4. ### physics

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work?
5. ### physics

A large crate weighing 850 N is slid across the floor of a shop. To move the crate 15 m at a steady spead of 10 cm/s, a constant horizontal force of 80 N is applied to the crate. How much work was done in moving the crate?
6. ### Physics

A 1440-kg crate of cabbages is laid on a level, frictionless track at the end of a heavy spring. The spring is compressed a distance of 0.100 m by a force of 83500 N. When the spring is released, it propels the crate. the spring constant …
7. ### Physics

A 1440-kg crate of cabbages is laid on a level, frictionless track at the end of a heavy spring. The spring is compressed a distance of 0.100 m by a force of 83500 N. When the spring is released, it propels the crate. the spring constant …
8. ### physics

a. How much power is generated by a motor that lifts a 300.0 kg crate vertically 8.0 meters in 6.0 seconds?
9. ### Physics

a 5 kg crate falls from a height of 2.0 m into an industrial spring scale. When the crate comes to rest the compression of the spring is 24 cm. what is the spring constant?
10. ### physics

A 5kg crate falls from height of 2 m into an industrial spring scale. When the crate comes to rest the compression of the spring is 25 cm what is the spring constant?

More Similar Questions