Revision UPS2

The work done of vectors force, F and displacement, s are separated by angle, ɵ can be calculated using

• cross product.
• dot product.
• addition of two vectors.
• subtraction of two vectors.

Kinetic energy depends on the mass and height.

• mass and height.

• mass and speed.

• height and speed.

• mass and gravity.

Potential energy does not depend on what?

• mass

• height

• gravity

• velocity

The principle of conservation of energy states that

• In an isolated system, total energy is conserved.

• Kinetic energy is always equal to potential energy.

• Net work done on a system equals to change in kinetic energy.

• Energy can be created and destroyed, it can also be transferred or changed from one form to another.

Work–energy theorem states that the work done by the net force on a body is equal to what?

• the kinetic energy.

• the elastic potential energy.

• the change in the body’s kinetic energy.

• the energy.

Object that is initially at rest at certain height will have

• kinetic energy
• potential energy
• both kinetic and potential energy
• no energy

What is the definition of average power?

• The rate at which work is done
• Energy changing forms
• The ability to do work
• The energy of motion

Which of the following parameters remain constant for an object under uniform circular motion?

• Linear speed.
• Period
• Linear velocity
• Tangential acceleration

The direction of speed for an object that is moving in a circular path is

• always tangent to the circular path

• always towards the center of the circular path

• always straight

• always circular

Conditions for equilibrium of a rigid body

• The net force acting on the body is zero

• The net torque acting on the body is zero

• Both the net force and net torque acting on the body are zero

• Not all of the answers given