Sunday
April 20, 2014

Homework Help: Physics

Posted by Anonymous on Saturday, April 9, 2011 at 8:36pm.

please can u check my answer

Here are the questions:
1. A 0.45 kg book is resting on a dessktop 0.64 m high. Calculate the book's potential energy relative to
a)the desktop? b)the floor.

2. A 0.636 kg basketball has a potential energy of 19J at teh basket. How high is teh ball from the floor?

3. A hockey puck has a potential energy of 2.3J when it is held by a referee at a height of 1.4 m above the rink surface. calculate the mass of puck?

My solutions:(used Eg=mgh to get all solutions)
1. a) 2.8J b) 0
2. h=31m
3. 0.6176 kg

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - 1. You slowly lift a book of mass 2 kg at a constant velocity a ...
physics - When you push a 2.05 kg book resting on a tabletop it takes 2.45 N to ...
Physics - In starting an exercise, a 1.60-m tall person lifts a 2.10 kg book ...
Physical Science - I need to know what equations to use! (A)How much work is ...
Physics - A 245 g particle is released from rest at point A inside a smooth ...
Physics - A 3.60 kg book is initially on a shelf located 1.80 m above the floor...
physics - When you push a 1.70 kg book resting on a tabletop it takes 2.60 N to ...
physics - When you push a 1.70 kg book resting on a tabletop it takes 2.60 N to ...
physics - When you push a 1.55 kg book resting on a tabletop it takes 2.10 N to ...
physics - I keep geting this question wrong and cant figure out what i am doing ...

Search
Members