Edumarz

Menu

Tag: PHYSICS

Write an expression for the kinetic energy of an object.

Class 9 Physics
Read More

What is the kinetic energy of an object?

Class 9 Physics
Read More

A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?

Class 9 Physics
Read More

Define 1 J of work?

Class 9 Physics
Read More

Write an expression for the work done when a force is acting on an object in the direction of its displacement.

Class 9 Physics
Read More

When do we say that work is done?

Class 9 Physics
Read More

A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 11.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case?

Class 9 Physics
Read More

A stone is thrown vertically upward with an initial velocity of 40 m/s. Taking g = 10 m/s2, find the maximum height reached by the stone. What is the net displacement and the total distance covered by the stone?

Class 9 Physics
Read More

. A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate (i) the maximum height to which it rises, (ii) the total time it takes to return to the surface of the earth.?

Class 9 Physics
Read More

Gravitational force on the surface of the moon is only 1 6 as strong as gravitational force on the earth. What is the weight in newtons of a 10 kg object on the moon and on the earth?

Class 9 Physics
Read More

Why will a sheet of paper fall slower than one that is crumpled into a ball?

Class 9 Physics
Read More

Amit buys a few grams of gold at the poles as per the instruction of one of his friends. He hands over the same when he meets him at the equator. Will the friend agree with the weight of gold bought? If not, why? [Hint: The value of g is greater at the poles than at the equator?

Class 9 Physics
Read More
Loading...
Load more