1 Energy stored due to height is called: A Kinetic energy B Thermal energy C Gravitational potential energy D Electrical energy
2 Sam is studying the SI unit of work and energy. She knows that work and energy are measured in the same unit. What is the SI unit of work and energy? A Joule B Newton C Watt D Pascal
3 Waseem is studying power. He knows that power is measured in watts. What is the formula for power? A Power = Work / Time B Power = Work × Time C Power = Force × Distance D Power = Mass × Acceleration
4 What is meant by work done in physics? A Force applied without movement B Movement without force C Force causing displacement D Energy stored in an object
6 Lara is studying power. She knows that power is the rate of doing work. A motor does 500 J of work in 10 seconds. What is the power of the motor? A 50 W B 500 W C 5 W D 5000 W
7 According to conservation of energy, total energy remains: A Increasing B Decreasing C Constant D Zero
8 George is studying solar energy. He knows that solar energy can be used directly to heat water using solar collectors. What type of energy is solar energy? A Renewable B Non-renewable C Nuclear D Geothermal
9 Chloe is studying the conversion of energy in a hydroelectric dam. The potential energy of water is converted to kinetic energy, which then turns turbines. What is the final form of energy? A Chemical energy B Electrical energy C Nuclear energy D Thermal energy
12 Emma is studying the kinetic energy of a moving car. The car has a mass of 1000 kg and is moving at a speed of 20 m/s. What is the kinetic energy of the car? A 200,000 Joules B 20,000 Joules C 10,000 Joules D 200 Joules
13 Rachel is studying work. She knows that work is done when a force moves an object in the direction of the force. If the force and displacement are perpendicular to each other, what is the work done? A Zero B Maximum C Minimum D Equal to the force
14 Bilal is holding a heavy book stationary at a height of 1 meter above the ground. He is exerting an upward force, but the book does not move. How much work is Bilal doing on the book? A Work equal to the weight of the book B Zero work C Work equal to the height D Work equal to the mass times the height
16 Sam is studying efficiency. She knows that efficiency is the ratio of useful output energy to input energy. A machine has an input of 500 J and an output of 300 J. What is the efficiency of the machine? A 60% B 50% C 30% D 100%
17 Tina is studying energy forms. She knows that energy can exist in different forms. Which of the following is a form of energy? A Kinetic energy B Mass C Temperature D Density
18 Oliver is studying the conservation of energy. He knows that energy is conserved in a closed system. In a roller coaster, where is the potential energy maximum? A At the highest point B At the lowest point C At the middle of the track D It is constant everywhere
20 Ahmed is pushing a heavy box across a horizontal floor with a force of 50 N over a distance of 10 meters. He wants to know how much work he has done. What is the work done? A 500 Joules B 50 Joules C 5 Joules D 5000 Joules
21 Chloe is lifting a 5 kg mass vertically upward to a height of 2 meters. She wants to calculate the work done against gravity. What is the work done? (Take g = 10 m/s²) A 10 Joules B 50 Joules C 100 Joules D 20 Joules
22 Perpetual motion machines are impossible because they violate: A Law of motion B Law of inertia C Law of conservation of energy D Law of gravitation
23 Yusuf is studying the conservation of energy. He knows that the total energy in an isolated system remains constant. In a swinging pendulum, where is the kinetic energy maximum? A At the highest point B At the lowest point C At the midpoint D It is constant everywhere
24 Uma is studying the work-energy principle. She knows that work done on an object changes its energy. If a force does 200 J of work on a stationary object, what is the increase in kinetic energy? A 200 J B 100 J C 400 J D 0 J
29 Julia is studying wave energy. She knows that wave energy is generated by the movement of waves. What type of energy is wave energy? A Mechanical energy B Electrical energy C Chemical energy D Nuclear energy
30 Khalid is studying tidal energy. He knows that tidal energy is generated by the rise and fall of tides. What causes tides? A Wind B Gravitational forces of the Moon and Sun C Earth's rotation D Ocean currents