Homework Help: physics

Posted by susane on Monday, November 6, 2006 at 8:03am.

A 1-kg block is lifted vertically 1m by a boy. The work done by the boy would be one jule or would no work be done. I'm confused, I thought lifting wasn't considered work.

The work done is actually about 9.81 joules. Think of gravity pulling on the block as an invisible string connecting the block to the Earth. If you lift the block you store energy in the gravitational field (you "strech the string" a bit more) which you can release by dropping the block.

You are correct, Count.

No one has answered this question yet.

Answer this Question

Related Questions

Physics ~Work Kinetic Energy~ - 1.)A ball (m 0.5 kg) starts from rest and has ...
Physics - A 43.3 kg boy and a 60.0 kg girl are on the surface of a frozen lake, ...
Physics please help!! - A 43.3 kg boy and a 60.0 kg girl are on the surface of a...
Physics - Two boys standing on carts that move along a horizontal frictionless ...
physics - the mass of the boy is 70kg. calculate the force in newtons acting on ...
Physics - A boy on a 2.4 kg skateboard initially at rest tosses a(n) 8.2 kg jug ...
Physics - A boy on a bucycle drags a wagon full of newspapers at 0.80m/s for 30 ...
Physics - If the 50.0 kg boy were in a spacecraft 5R from the center of the ...
physics - A boy on roller blades throws a jug of water away from himself, giving...
Physics - A boy is standing on a skateboard holding two 5.0 kg bowling balls. ...

For Further Reading

First Name:
School Subject:
Answer: