(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

From the displacement-time graph of a cyclist given below in the Figure, find The time after which he reaches the starting point .

The acceleration produced in a body by a force of given magnitude depends on

A force acts for 10 s on a stationary body of mass 100 kg, after which the force ceases to act. The body moves through a distance of 100 m in the next 5 s. Calculate : The acceleration produced by the force

Figure shows the velocity-time graph of a particle of mass 100 g moving in a straight line. Calculate the force acting on the particle.
(Hint : Acceleration = Slope of the v-t graph)

A force acts for 0.1 s on a body of mass 2.0 kg initially at rest. The force is then withdrawn and the body moves with a velocity of 2 m s^-1. Find the magnitude of the force. 

A car is moving with a uniform velocity 30 ms^-1. It is stopped in 2 s by applying a force of 1500 N through its brakes. Calculate the following values :  The retardation produced in car.

Define the term acceleration due to gravity? Write its S.I. unit.

How is the acccelaration due to gravity on the surface of the earth realted to its mass and radius ? 

How are g and G realated ? 

A body is projected vertically upward with an initial velocity u . If acceleartion due to gravity is g , the time for which it remains in air , is : 

An object falling freely from rest reaches ground in 2 s. If acceleration due to gravity is 9.8 m s^-2, then the velocity of object on reaching the ground will be 

What force, in newton, your muscles need to apply to hold a mass of 5 kg in your hand? State the assumption.

Which of the following solar radiations pass through the atmosphere of Earth: X -rays, ultraviolet rays, visible light rays or infrared radiation?

Complete the following sentences:

An average person can hear sound of frequencies in the range ______ to _________.

Complete the following sentence:

Ultrasound is of frequency ___________.