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The energy possessed by a moving object is:
A. Kinetic energy
B. Potential energy
C. Thermal energy
D. Chemical energy
Answer: Kinetic energy
The energy of a stationary object is:
A. Potential energy
B. Kinetic energy
C. Thermal energy
D. Electrical energy
Answer: Potential energy
The power of a device that uses 200 J of energy in 10 seconds is:
A. 20 W
B. 200 W
C. 2 W
D. 0.5 W
Answer: 20 W
The work done by a force of 50 N moving an object 10 meters is:
A. 500 J
B. 50 J
C. 10 J
D. 1000 J
Answer: 500 J
The unit of power is:
A. Watt
B. Joule
C. Newton
D. Pascal
Answer: Watt
The energy required to lift a 10 kg object to a height of 5 meters is:
A. 500 J
B. 100 J
C. 50 J
D. 10 J
Answer: 500 J
The formula for gravitational potential energy is:
A. PE = mgh
B. PE = 1/2 mv^2
C. PE = F × d
D. PE = 1/2 kx^2
Answer: PE = mgh
The energy of a car moving with a velocity of 20 m/s and mass 800 kg is:
A. 160,000 J
B. 80,000 J
C. 40,000 J
D. 20,000 J
Answer: 160,000 J
The energy of an object in motion is called:
A. Kinetic energy
B. Potential energy
C. Thermal energy
D. Chemical energy
Answer: Kinetic energy