Unit 2: Week 2 Quizizz Review_8th Grade

Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.

• 18 J
• 36 J
• 12 J
• 6 J

How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s?

• 27 J
• 18 J
• 9 J
• 2 J

When a pendulum swings, at which point is potential energy at its greatest?

• 1
• 2
• 3
• 4

When a pendulum swings, at which point is kinetic energy highest?

• 1
• 2
• 3
• 4

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

A cheetah can run briefly with a speed of 31.0 m/s. Suppose a cheetah with a mass of 47.0 kg runs at this speed. What is the cheetah’s kinetic energy?

• 1457 Joules

• 22,584 Joules

• 15 Joules

• 45,167Joules

What is the equation for calculating kinetic energy?

• mv

• 1/2 mv^2

• mgh

• Ft

If the 0.3 kg marble was moving at 6 m/s at the bottom of the ramp, how much kinetic energy did the marble have? (KE = 1/2mv²)

• 5.4 J

• 1.8 J

• 3 J

• 6 J

An explosion of gas from a Hawaiian volcano blows a rock into the sky. the rock has 10 kg of mass. if the rock had a velocity of 20m/s, what is the kinetic energy?

• 4000 Joules

• 20,000Kg

• 10Kg

• 2000 Joules