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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 The force is then withdrawn and the body moves with a velocity of 2 m s-1.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.
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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.
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Define the term acceleration due to gravity? Write its S.I. unit.
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How is the acccelaration due to gravity on the surface of the earth realted to its mass and radius ?
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How are g and G realated ?
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A body falls freely under gravity from rest and reaches the ground in time t. Write the expression for the height fallen by the body.
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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 :
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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
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What force, in newton, your muscles need to apply to hold a mass of 5 kg in your hand? State the assumption.
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Which of the following solar radiations pass through the atmosphere of Earth: X -rays, ultraviolet rays, visible light rays or infrared radiation?
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Which has the higher frequency - ultrasonic sound or infrasonic sound?
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Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
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Complete the following sentence:
Ultrasound is of frequency ___________.
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Complete the following sentence:
Infrasonic sound is of frequency ______________.
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Complete the following sentence:
Bats can produce and hear ___________ sound.
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Complete the following sentence:
Elephants produce ____________sound.
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Name the sound of the frequency given below:
10 Hz
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Name the sound of the frequency given below:
100 Hz
Concept: undefined >> undefined
Name the sound of the frequency given below:
1000 Hz
Concept: undefined >> undefined
Name the sound of the frequency given below:
40 kHz
Concept: undefined >> undefined
