State whether the following objects possess kinetic energy, potential energy, or both :
(a) A man climbing a hill
(b) A flying aeroplane
(c) A bird running on the ground
(d) A ceiling fan in the off position
(e) A stretched spring lying on the grund.

Name the type of energy (kinetic energy K or potential energy U) possessed in the following cases : (a) A moving cricket ball (b) A compressed spring (c) A moving bus (d) A stretched wire (e) An arrow shot out of a bow (f) A piece of stone placed on the roof.

What kind of energy is possessed by the following ? (a) A stone kept on roof-top. (b) A running car. (c) Water stored in the reservoir of a dam. (d) A compressed spring. (e) A stretched rubber band.

What kind of energy is possessed by the following ? (a) A stone kept on roof-top. (b) A running car. (c) Water stored in the reservoir of a dam. (d) A compressed spring. (e) A stretched rubber band.

State the kind of energy (potential or kinetic or both) in case of following : (a) Stone resting on the top of a hill. (b) An arrow shooting from a stretched bow and arrow system. (c) A flying mosquito (d) A wound-up spring of a toy car (e) A speeding car (f) A bullet fired from a gun.

State whether the following quantity is a scalar or vector ? (a) pressure " " (b) force (c) momentum " " (d) energy (e) weight " " (f) speed.

Energy can exist in several forms and may change from one form to another. For each of the following state the energy changes that occur in : (a) the unwinding of a watch spring. (b) a loaded truck when started and set in motion (c) a car going uphill, (d) photosynthesis in green leaves, (e) charging of a battery, (f) respiration, (g) burning of a match stick. (h) explosion of crackers

In figure, k = 100 N//m, M = 1kg and F = 10 N (a) Find the compression of the spring in the equilibrium position (b) A sharp blow by some external agent imparts a speed of 2 m//s to the block towards left. Find the sum of the potential energy of the spring and the kinetic energy of the block at this instant. (c) Find the time period of the resulting simple harmonic motion. (d) Find the amplitude. (e) Write the potential energy of the spring when the block is at the left estreme. (f) Write the potential energy of the spring when the block is at the right extreme. The answers of (b), (e) and (f) are different. Explain why this does not violate the principle of conservation of energy ?

In figure, k = 100 N//m, M = 1kg and F = 10 N (a) Find the compression of the spring in the equilibrium position (b) A sharp blow by some external agent imparts a speed of 2 m//s to the block towards left. Find the sum of the potential energy of the spring and the kinetic energy of the block at this instant. (c) Find the time period of the resulting simple harmonic motion. (d) Find the amplitude. (e) Write the potential energy of the spring when the block is at the left estreme. (f) Write the potential energy of the spring when the block is at the right extreme. The answers of (b), (e) and (f) are different. Explain why this does not violate the principle of conservation of energy ?

Consider a one-dimensional motion of a particle with total energy E. There are four regions A, B, C and D is which the relation between potential energy U, kinetic energy (K) and total energy E is as given below RegionA: UgtE Region B: UltE Region C: KltE Region D: UgtE State with reason in each case whether a particle can be found in the given region or not.