Work,Power and Energy(Test 1) Work,Power and Energy (Test 1) 1 / 10Work done by a force is zero when: Displacement is maximum Force is zero Displacement is perpendicular to force Force and displacement are in the same direction 2 / 10A body of mass 2 kg is lifted to a height of 5 m. The work done is: 10 J 50 J 100 J 20 J 3 / 10The SI unit of power is: Joule Watt Newton Pascal 4 / 10A force of 10 N moves a body by 2 m in the direction of force. Work done is: 5 J 10 J 20 J 0 J 5 / 10Kinetic energy of a body of mass m moving with velocity v is: mv mv² ½mv² m²v 6 / 10A 100 W bulb is used for 10 hours. Energy consumed is: 1 kWh 10 kWh 0.1 kWh 1000 kWh 7 / 10Potential energy of a body depends on: Velocity Acceleration Height Temperature 8 / 10A spring has spring constant k. Work done in stretching it by x is: kx ½kx² kx² ½kx 9 / 10Power is defined as: Work × Time Work / Time Force × Distance Energy × Time 10 / 10A machine does 500 J of work in 10 s. Its power is: 50 W 5 W 5000 W 0.5 W Your score isThe average score is 0% 0% Restart quiz
