WorksheetsUnit 7 Physics Review
Total questions: 17
Worksheet time: 12mins
The formula for work is:
d = r x t
P = m x v
F = m x a
W = F x d
What is the power of a kitchen blender if it can perform 3,750 joules of work in 15 seconds?
56, 250 watts
250 watts
1875 watts
3602 watts
In which situation is work not being done?
a 26 Kg wagon being pulled
a 30 Kg present being held above the floor
a 60 Kg weight being lifted up off the ground
a 13 Kg cat running across the floor
Gravitational Potential energy depends on what two things?
mass and velocity
gravity and velocity
weight and height
angle and work
Energy is neither_______________________ nor ______________________
conserved, reserved
decreased, destroyed
transferred, expelled
created, destroyed
A 75 kg skier is standing at rest at the top of a 25 m hill. What would his speed be at the bottom of the hill?
18,375 m/s
11.06 m/s
240,000 m/s
22.1 m/s
A 65 kg person is sitting 6 m from the ground on a balcony. What is the person's gravitational potential energy?
380 J
382.2 J
3822 J
195 J
Doing work over a shorter period of time does what to power?
decreases power
increases power
power remains the same
increases then decreases
What is the maximum mass a person can lift at the height of 2 m in 300 s if the individual produces 2360 watts of power?
2630.4 Kg
36122.4 Kg
150 Kg
13692 Kg
Energy is transferred out of the system in what form?
heat
kinetic energy
potential energy
gravitational energy
