QUIZ- Work, Energy, Power

Which of the following is the unit of WORK.

• Joule, J

• Watt, W

• Newton, N

• Volt, V

ENERGY is defined as...

• the rate of power

• the ability to do work

• the rate of work

• the ability to generate power

A box is being pushed horizontally on an inclined surface by 15 N of force, in a distance of 3.5 m. Calculate the work generated by the 15 N or force?

• 52.5 Joule

• 60 Joule

• 55.5 Joule

• 59 Joule

Which of the following statements is true about WORK.

• Work is a vector quantity

• Work done can be positive or negative

• Work have same unit as the energy

• Work is done when a force is applied on object

Figure shows a 10 N force acting on a box. The box moves 5 m to the right. Calculate the work done by the force.

• 50 J

• 50 N

• O J

• 5 J

A boy pulls a 30 kg box up a smooth plane inclined at 30^o to the horizontal as shown in figure. If the length of the plane is 5 m, calculate the work done in pulling the box to the top of the plane.

• 1471.5 J

• 129.9 J

• 1274.36 J

• 735.75 J

Which statement is not true about Potential Energy?

• The energy possessed by an object due to its position or state or location

• Gravitational energy is a part of potential energy

• Depends on the weight, height and gravitational field

• The formula is

  E_p = m.g.h

Which statement is true about Kinetic Energy?

• The energy an object possesses due to the location

• The formula is

  E_k = 1/2mv

• The Kinetic Energy of a moving object depends on its mass and velocity

• The unit of Kinetic Energy is Newton

A ball is throw in the direction as shown in figure. At which point does the ball possess minimum kinetic energy.

• R

• Q

• P

• S

All the statements are true about Principle of Conservation Energy, except...

• States that energy can neither be created nor destroyed, but can be converted from one form to another

• Potential Energy + Kinetic Energy = 100% (Maximum Energy)

• Potential Energy and Kinetic Energy is equal to each other

• If the Potential Energy is at maximum, the Kinetic Energy is at minimum.