Physics
Assertion (A): Weight is equal to mass in deep space.
Reason (R): Weight depends on gravitational force.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true and R is not the correct explanation of A
- A is true but R is false
- A is false but R is true
Motion in One Dimension
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Answer
A is false but R is true
Explanation
Assertion (A) is false because weight is not equal to mass in deep space but the gravitational force is extremely small there, so the weight of an object becomes nearly zero, while its mass remains unchanged.
Reason (R) is true because the weight of a body is the force with which earth attracts the body i.e. the weight of a body is the force of gravity.
Therefore, assertion is false but reason is true.
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Related Questions
A cyclist taking a turn on a road is an example of …………… motion.
- rectilinear
- translatory
- curvilinear
- circular
In …………… motion, the distance of a point on the body remains constant from a fixed reference point.
- vibratory
- rectilinear
- curvilinear
- circular
Assertion (A): If a moving body travels equal distances in equal intervals of time, its motion is said to be uniform.
Reason (R): For uniform motion, the speed of the moving body remains constant.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true and R is not the correct explanation of A
- A is true but R is false
- A is false but R is true
Fill in the blanks:
(a) Two boys cycling on the road with the same speed are …………… relative to each other.
(b) The motion in a …………… is rectilinear motion.
(c) One to and fro motion of a clock pendulum takes time = …………… .
(d) 36 km h-1 = …………… m s-1.
(e) Total distance travelled = …………… x total time taken.
(f) The weight of a girl is 36 kgf. Her mass will be …………… .
(g) The weight of a body is measured using …………… .