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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the kinetic energy of a 3 kg object moving at 2 m/s?
💡 Hint: Use the formula KE = 1/2 mv².
Question 2
Easy
If an object has a mass of 4 kg and is at rest, what is its kinetic energy?
💡 Hint: Remember that KE depends on motion.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the formula for kinetic energy?
- KE = mv
- KE = 1/2 mv²
- KE = mgh
💡 Hint: Remember how speed influences energy!
Question 2
True or False: An object at rest has kinetic energy.
- True
- False
💡 Hint: Think about what KE depends on.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A sports car of mass 1200 kg travels at a speed of 25 m/s. Determine its kinetic energy. Then, if the car comes to a stop, how much kinetic energy is converted to other forms?
💡 Hint: Calculate the KE first, and remember that stopping means all KE is used up.
Question 2
An object has a kinetic energy of 250 J and a mass of 10 kg. Find its velocity. If the object is subjected to an external force that causes it to accelerate to 20 m/s, what will be the new kinetic energy?
💡 Hint: Use the relationship between KE, mass, and velocity to find unknowns.
Challenge and get performance evaluation