D11P1 Physics Quiz

The impulse experienced by a body is equivalent to its change in

• Velocity

• Kinetic energy

• Momentum

• Acceleration

Which statement is false about the impulse

• Impulse is a scalar quantity

• Impulse is a vector quantity

• Unit for impulse is newton seconds

• Is a change of momentum

Direction of momentum is direction object

• Mass

• Acceleration

• Velocity

• Frictional force

If firely collides with the windshield of a fast-moving bus ,which statement is correct?

• The bus experiences an impact force with larger magnitude

• The firely and bus experience forces with same direction

• The firely and bus experience forces with same magnitude

• The firefly experiences an impact force with a larger magnitude

The bodies will finally stick together where final velocity for both of them are same. This statement show a type of collision

• Elastic collision

• Inelastic collision

What definition of potential energy?

• The product of the component of the force parallel to the displacement times the displacement of a body

• The energy stored in a body or system because of its position

• As the system ability to do work

The kinetic energy of an object does not depend on

• Mass of the object

• Momentum

• Direction of velocity

All statement below about average power are correct EXCEPT

• Average power depends on total time taken

• Average power depends on derection of moving object

• Average power depends on total amount of work done

• Average power does not depends on direction of moving object

work is

• Derived quantity

• Vector quantity

• Scalar quantity

• Basic quantity

State the principle of conservation of energy

• Is the retarding force that resist the motion of a body as it slides over the rough surface

• Is the tendency of an object to resist any changes in its state of rest of motion

• In isolated system, the mechanical energy if the system is the sum of its potential energy , and the kinetic energy if the object is constant

• In isolated system , total energy is constant