WorksheetsP1 Calculations
Total questions: 15
Worksheet time: 26mins
Which of the following is the correct equation for calculating an object's gravitational potential energy?
PE = mgh
PE = mg / h
PE = mg + h
PE = gh
What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground?
g = 9.8 m/s2
9.8 Joules
1.0 Joule
0.10 Joule
11.8 m/s2
if you push a cart with a force of 60 N for 2 m... how much work have you done
120 J
30 J
120 N
30 N
Two people push on a wall with 100 N. The wall doesn’t move. How much work is done?
100J
100N
0J
0N
A major league pitcher can throw a baseball with a kinetic energy of 150 J. How much work must the pitcher do to the ball to give it that much KE?
150 J
0
Can’t tell without knowing the mass of the ball
How much power is required to raise a 200-kg crate a vertical distance of 2 m in a time of 4 s?
400 W
1000 W
1600 W
4000 W
What is the equation for work?
Ep= mgh
W = F x d
F = mg
F = ma
Which equation is the one for power?
P = F/A
W = F x t
p = m v
P = W / t
Ian and Steve ski down the 75 m slope in 80 seconds using 400 N of penguin force. Calculate their penguin power!
375 W
37.5 W
426.7 W
240 000W
This car needs 8600J of energy to power it. If 5000J is changed into useful energy, how much energy is wasted?
13600J
3600J
5000J
8600J
