Question detail
If a car has a mass of 1000 kg and is moving at a speed of 20 m/s, calculate its kinetic energy.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
If a car has a mass of 1000 kg and is moving at a speed of 20 m/s, calculate its kinetic energy.
Answer
The kinetic energy of the car is 200,000 joules.
Explanation
This answer stays anchored to Changes in energy and uses the approved objective: Identify kinetic energy in joules, mass in kilograms and speed in metres per second..
Common mistake
Confusing Units of Measurement
Students often confuse kinetic energy measured in joules with mass measured in kilograms and speed measured in metres per second.
Always remember that kinetic energy is expressed in joules (J), mass in kilograms (kg), and speed in metres per second (m/s). Keep the units distinct and practice converting between them if necessary.
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