Advertisements
Advertisements
Question
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.
Advertisements
Solution
Initial velocity, u = 0.
Time taken = t.
Acceleration due to gravity = g.
Let 'h' be the height fallen.
`"h" = "ut" + 1/2 "gt"^2`
`"h" = 1/2 "gt"^2`
APPEARS IN
RELATED QUESTIONS
What do you mean by free fall?
When an object is dropped from a height, it accelerates and falls down. Name the force which accelerates the object.
What is the force of gravity on a body of mass 150 kg lying on the surface of the earth? (Mass of earth = 6 x 1024 kg; Radius of earth = 6.4 x 106 m; G = 6.7 x 10-11 Nm2/kg2)
Name the force which wears away two surfaces as they move over one another.
A pressure of 10 Pa acts on an area of 3.0 m2. What is the force acting on the area ? What force will be exerted by the application of same pressure if the area is made one-third ?
What would be the value of ‘g’ on the surface of the earth if its mass was twice and its radius half of what it is now?
How is the acccelaration due to gravity on the surface of the earth realted to its mass and radius ?
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 :
What force, in newton, your muscles need to apply to hold a mass of 5 kg in your hand? State the assumption.
The mass and weight of an object on earth are 5 kg and 49 N respectively. What will be their values on the moon? Assume that the acceleration due to gravity on the moon is 1/6th of that on the earth.
