Practice Kinetic Energy (ke) (2.2.4) - Work, Energy and Power

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6 sample questions

Question 1.
Calculate the kinetic energy of a 2 kg ball moving at 10 m/s.
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Use the kinetic energy formula.
Question 2.
If an object has a kinetic energy of 50 J and its velocity is 10 m/s, what is its mass?
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Use the kinetic energy formula and solve for mass.
3Question 3.
What is the formula for kinetic energy?
- A) KE = mv
- B) KE = (1/2)mv²
- C) KE = mv²
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Think about how mass and speed influence energy.
4Question 4.
If a moving object’s speed is increased, what happens to its kinetic energy?
- True
- False
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Recall how speed is factored into the kinetic energy formula.
Question 5.
A truck with a mass of 9000 kg travels at 15 m/s. Calculate its kinetic energy. After it collides and loses half its speed, what is the new kinetic energy?
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Calculate initial and final kinetic energies using the formula.
Question 6.
A cyclist with a mass of 70 kg is cycling at 10 m/s. How much additional kinetic energy does she gain if she speeds up to 20 m/s?
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Calculate the change in KE by finding the difference between final and initial kinetic energies.

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