A car engine does 3000 J of work in 5 seconds. What is the power of the engine?
Practice Questions
Q1
A car engine does 3000 J of work in 5 seconds. What is the power of the engine?
600 W
800 W
1000 W
1200 W
Questions & Step-by-Step Solutions
A car engine does 3000 J of work in 5 seconds. What is the power of the engine?
Correct Answer: 600 W
Step 1: Identify the work done by the engine, which is 3000 J (joules).
Step 2: Identify the time taken to do the work, which is 5 seconds.
Step 3: Use the formula for power, which is P = W/t, where P is power, W is work, and t is time.
Step 4: Substitute the values into the formula: P = 3000 J / 5 s.
Step 5: Calculate the power: 3000 J divided by 5 s equals 600 W (watts).
Power Calculation – Power is defined as the rate at which work is done, calculated using the formula P = W/t, where P is power, W is work done, and t is time.
