An arrow is released from a stretched bow: If the objects were not brought in those states, would they have moved?

An arrow is released from a stretched bow: A compressed spring is released.

An arrow is released from a stretched bow: Which words describe the state of the object in the above examples?

An arrow is released from a stretched bow: Water kept at a high flows through a pipe into the tap below.

An arrow is released from a stretched bow: Where did the energy required to cause the motion of the objects come from?

If the object is at infinity from a convex lens, what would be its size?

What would have happened if there were no air on the earth?

A point particle of mass m, moves long the uniformly rough track PQR as shown in figure. The coefficient of friction, between the particle and the rough track equals mu . The particle is released, from rest from the point P and it comes to rest at a point R. The energies, lost by the ball, over the parts, PQ and QR, of the track, are equal to each other, and no energy is lost when particle changes direction from PQ to QR. The value of the coefficient of friction mu and the distance x (=QR) , are, respectively close to:

When released from certain height why do objects tend to fall vertically downwards?

A point object is moving uniformly towards the pole of a concave mirror of focal length 25 cm along its axis as shown below. The speed of the object is 1 ms" . At t = 0, the distance of the object from the mirror is 50 cm. The average velocity of the image formed by the mirror between time t = 0 and t = 0.25 s is

Questions based on paragraph Study the following activity and answer the questions. Take two aluminium channels of different lengths. Place the lower ends of the channels on the floor and hold their upper ends at the same height. Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance. At the moment of releasing the balls, which energy do the balls have?