LCHS Physics 2020-21 Week 29 Quiz

Two factors that determine work are

• size of the force and distance

• size of the force and type of force

• mass and distance

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

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

How do you calculate power?

• P = W/t
• P = E/t
• P = w * t
• P = bbq/chicken

What is the formula for Kinetic Energy?

• PE = m*g*h

• KE = 1/2m*v²

• W = F*d

• P = W/t

What is the formula for Gravitational Potential Energy?

• PE = m*g*h

• KE = 1/2m*v²

• W = F*d

• P = W/t

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N
• 15 N
• 1.5 N
• 150 N

On a roller coaster, where is maximum potential energy?

• At the bottom of a big hill
• When going around a corner
• When going upside down
• At the top of a big hill

Suppose a heavy crate is pulled across the floor. Consider that the distance is 3 m and the force is 5 N. The rope attached to the box is at 60 degrees above the horizontal. How much work is done on the box? It is highly recommended that you sketch this out.

• 7.5 J

• 14 J

• 18 J

• 22 J

Austin is about to bungee jump for the first time. If he is 90 kg and 200 m above the canyon floor, how much gravitational potential energy does he have? Use g = 9.8 m/s² and choose the closest response.

• 110 kJ

• 123 kJ

• 135 kJ

• 176 kJ