Work is said to be done when:
A) A force is applied
B) An object moves in the direction of applied force
C) There is no displacement
D) An object remains stationary
The SI unit of work is:
A) Joule
B) Newton
C) Watt
D) Pascal
Which of the following is NOT a form of energy?
A) Kinetic energy
B) Potential energy
C) Frictional energy
D) Chemical energy
Power is defined as:
A) Work done per unit time
B) Energy stored in an object
C) Force applied per unit time
D) Displacement per unit time
The SI unit of power is:
A) Joule
B) Newton
C) Watt
D) Pascal
Kinetic energy depends on:
A) Only mass
B) Only velocity
C) Both mass and velocity
D) Only height
Potential energy is given by the formula:
A) PE = 1/2 mv²
B) PE = mg
C) PE = mgh
D) PE = mv
A 100 W bulb consumes how much energy in 1 hour?
A) 100 J
B) 3600 J
C) 360000 J
D) 600 J
Which of the following is an example of potential energy?
A) A moving car
B) A compressed spring
C) A running athlete
D) A thrown ball
Which of the following has the greatest kinetic energy?
A) A moving bicycle
B) A moving train
C) A flying bird
D) A rolling ball
Work done is negative when:
A) Force is applied in the direction of motion
B) Displacement is in the direction of force
C) Force and displacement are in opposite directions
D) No force is applied
What happens to kinetic energy when velocity is doubled?
A) Remains the same
B) Doubles
C) Triples
D) Becomes four times
Gravitational potential energy depends on:
A) Mass and height
B) Only height
C) Only mass
D) Speed of an object
The energy stored in food is:
A) Mechanical energy
B) Chemical energy
C) Electrical energy
D) Thermal energy
Which device converts mechanical energy into electrical energy?
A) Motor
B) Generator
C) Battery
D) Transformer
If no force is applied to an object, work done is:
A) Maximum
B) Minimum
C) Zero
D) Infinite
What type of energy does a moving pendulum have?
A) Only kinetic
B) Only potential
C) Both kinetic and potential
D) Nuclear energy
The rate of doing work is called:
A) Energy
B) Power
C) Force
D) Momentum
Which force does NO work on an object?
A) Friction
B) Gravity
C) Normal force (perpendicular to motion)
D) Applied force
What is the work done if a 10 N force moves an object 5 meters in its direction?
A) 50 J
B) 5 J
C) 0 J
D) 500 J
The power of a 60 W bulb indicates:
A) The energy it consumes per second
B) The brightness of light
C) The efficiency of the bulb
D) The resistance of the filament
What is the kinetic energy of a 2 kg object moving at 3 m/s?
A) 3 J
B) 6 J
C) 9 J
D) 18 J
What is the unit of energy in the SI system?
A) Watt
B) Joule
C) Ampere
D) Newton
Which of the following is an example of work being done?
A) Pushing a wall that does not move
B) Carrying a book while walking
C) Lifting a box upward
D) Holding a bag in hand
Which of the following has the least energy?
A) A moving truck
B) A stationary car
C) A falling ball
D) A flying airplane
The power of a machine that does 200 J of work in 5 seconds is:
A) 40 W
B) 20 W
C) 50 W
D) 25 W
A stretched rubber band has:
A) Kinetic energy
B) Electrical energy
C) Potential energy
D) Nuclear energy
Which of the following does NOT store potential energy?
A) Stretched rubber band
B) Water at the top of a dam
C) A rolling ball
D) A book placed on a shelf
Which energy transformation occurs in a battery-powered flashlight?
A) Mechanical to electrical
B) Chemical to light
C) Thermal to kinetic
D) Sound to electrical
Which of the following has more power?
A) A person running upstairs
B) A person walking upstairs
C) Both do equal work
D) Both require no power
