physics exercises

The rate of change of velocity is called:

• distance

• speed

• acceleration

• displacement

The distance and direction of a body from a fixed point shows its:

• acceleration

• velocity

• position

• none of these

When speed and direction of motion of a body do not change then the body will have:

• Uniform velocity

• uniform acceleration

• variable acceleration

• variable velocity

The branch of physics which deals with the motion of objects without any reference to the force is called:

• kinematics

• dynamics

• mechanics

• none of them

Newton's law of motion is also known as:

• law of conservation of momentum

• law of inertia

• law of universal gravitation

• none of these

The energy transformation that occur when a pendulum is held in position. it swings after being released :

• thermal to radiant

• chemichal to mechanical

• potential to kinetic

• electrical to mechanical

Which is the best approximation of the weight of an object of mass 800 gram?

• 88N

• 80N

• 8N

• 0.8N

If the force acting on a body is doubled , then the acceleration produced is:

• 1/2

• 1/4

• double

• quadrupled

The amount of energy required to raise temperature of a substance by  $1^0$ C is called as: 

• work capacity

• heat capacity

• energy capacity

• none of the above

The quantity of heat required to raise the temperature of a metal block of capacity of 520J/K from 9⁰c to 39⁰c is :

• 16500J

• 15600J

• 17500J