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If a 1000 kg car is moving at a speed of 36 km/h, what is its kinetic energy? (2
If a 1000 kg car is moving at a speed of 36 km/h, what is its kinetic energy? (2021)
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If a 1000 kg car is moving at a speed of 36 km/h, what is its kinetic energy? (2021)
500 J
1000 J
2000 J
3000 J
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Convert speed to m/s: 36 km/h = 10 m/s. KE = 1/2 * m * v^2 = 1/2 * 1000 kg * (10 m/s)^2 = 50000 J.
Questions & Step-by-step Solutions
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Q
Q: If a 1000 kg car is moving at a speed of 36 km/h, what is its kinetic energy? (2021)
Solution:
Convert speed to m/s: 36 km/h = 10 m/s. KE = 1/2 * m * v^2 = 1/2 * 1000 kg * (10 m/s)^2 = 50000 J.
Steps: 8
Show Steps
Step 1: Identify the mass of the car, which is 1000 kg.
Step 2: Identify the speed of the car, which is 36 km/h.
Step 3: Convert the speed from km/h to m/s. To do this, divide 36 by 3.6. This gives you 10 m/s.
Step 4: Use the formula for kinetic energy (KE), which is KE = 1/2 * m * v^2.
Step 5: Plug in the values: KE = 1/2 * 1000 kg * (10 m/s)^2.
Step 6: Calculate (10 m/s)^2, which is 100 m^2/s^2.
Step 7: Multiply 1000 kg by 100 m^2/s^2 to get 100000 kg*m^2/s^2.
Step 8: Now multiply by 1/2, which gives you 50000 J (Joules).
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