Question

State whether the following statements are true or false [05]

a. Potential energy changes into kinetic energy when it is put to use.

b. The density of water is maximum at its freezing point.

c. The motion of a train starting from one station and reaching at another station is

uniform.

d. The SI unit of volume is litre.

e. Two trains going in same direction with the same speed are at rest relative to each

other.

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Answer 1

Answer:

a) TRUE

b)FALSE

c)FALSE

d)FALSE

e)FALSE

Explanation:

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Answer 2

☆ Solution:

a) Potential energy changes into kinetic energy when it is put to use.

Answer: True .

b) The density of water is maximum at it's freezing point.

Answer: False.

Reason: Density of water is maximum at 4°C , whereas freezing point of water is 0°C.

c) The motion of a train starting from one station and reaching at another station is uniform.

Answer: False.

Reason: The motion of a train starting from one station and reaching at another station is non-uniform.

d) The S.I. unit of volume is litre.

Answer: False.

Reason: The S.I. unit of volume is m³.

e) Two trains going in same direction with the same speed are at rest relative to each other.

Answer: True.

☆ More Info ☆

• The energy possessed by a body by configuration or virtue of its position is called potential energy.

• The S.I. unit of mass is kilogram ( kg ) and volume is ( m³ ).

• The density of a material is denoted by the symbol " ρ " , pronounced a rho.