review work and energy

What is the common formula for work?

• W = Fdcosθ
• W = Fdsinθ
• W = Fd²cosθ 
• W = F²dsinθ

What are the units for work?

• Joules
• Meters
• Newtons
• Watts

Which of the following is the rate at which energy is transferred?

• Kinetic Energy
• Mechanical Energy
• Potential Energy
• Power

Which of the following is the equation for power?

• P = W/t
• P = (W)(t)
• P = W/d
• P = (W)(d)

As the skier goes down the hill, ________ energy increases while _______ energy decreases.

• Gravitational; Kinetic
• Kinetic; Gravitational
• Elastic; Kinetic
• Kinetic; Elastic

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

How much work is produced when 350 N is used to move a car 5 m?

• 70 J
• 1750 J
• 355 J
• 175 J

At the bottom of the hill, the skier jumps off of a ramp. The ramp causes the skier to _____.

• gain potential energy
• lose potential energy
• gain kinetic energy
• lose elastic energy

Calculate the PE of a 2 kg cat perched 10 meters above the ground. 

• 20 J
• 200 J
• 2.04 J
• 200 W

Sue raises a stack of books 2 meters using a force of 20N.  Calculate work. 

• 392 J
• 392 W
• 40 J
• 40 W

Calculate the Kinetic Energy (KE) of a girl whose mass is 50 kg and who is moving at 4 m/s.

• 200 J
• 800 J
• 400 J
• 100 J