Kinetic Energy (Med-Difficult)

Calculate the Ek of a runner that has a mass of 80 kg and is running at a velocity of 8 m/s

• 5120 J
• 320 J
• 640 J
• 2560 J

A 60 kg Ewok is travelling at a constant speed of 7 m/s. What is its kinetic energy in KJ?

• 1.47 KJ
• 210 KJ
• 147 KJ
• 1470 KJ

Tags

NGSS.MS-PS3-1

What is the kinetic energy of a 1500 gram object moving at a velocity of 100 m/s

• 112.5 J
• 7,500,000 J
• 75 J
• 7,500 J

Tags

NGSS.MS-PS3-1

What is the kinetic energy of a 25,000g object moving at a velocity of 2.5 m/s

• 78.125 J
• 31250 J
• 781.25 J
• 78,125 J

Tags

NGSS.MS-PS3-1

How much kinetic energy does a person of mass 50kg running at 3m/s have? Provide your answer in KJ.

• 225 KJ
• 0.225 KJ
• 75 KJ
• 0.075 KJ

Tags

NGSS.MS-PS3-1

What is the kinetic energy of a 30,000 g object moving at a velocity of 4 m/s. Provide you answer in KJ

• 240,000 KJ
• 240 KJ
• 2400 KJ
• 0.24 KJ

Tags

NGSS.MS-PS3-1

If a cannonball flies at a speed of 15 m/s and has 675J of kinetic energy, what is its mass?

• 90 Kg
• 6 Kg
• 350 Kg
• 22.5 Kg

An explosion of gas from a Hawaiian volcano blows a rock into the sky. the rock has 2000J of kinetic energy. What was its mass if the rock had a velocity of 20m/s

• 200Kg
• 20,000Kg
• 10Kg
• 200Kg

Tags

NGSS.MS-PS3-1

An object with a kinetic energy of 2160 J has a mass of 120 kg. Calculate its velocity.

• 720 m/s
• 6 m/s
• 36 m/s
• 72 m/s

An 8kg dog chases a cat. if the dog has 400J of kinetic energy. What is the speed of the dog?

• 10 m/s
• 5 m/s
• 1 m/s
• 100 m/s