P1 Calculations

How much KE does a moving 6 kilogram object have if it moves with a velocity of 3 m/s?

• 27 J
• 18 J
• 9 J
• 2 J

What is the mass of a moving object that has 100 Joules of KE and moves at a velocity of 2 m/s?

• 50 kg
• 200 kg
• 25 kg
• 100 kg

What kind of energy is in a rock at the edge of a cliff?

• Potential
• Kinetic

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

Which of the following is the best example of work being done. 

• doing homework
• lifting a box
• pushing a stationary box
• holding a box

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