The acceleration which can change only the direction of velocity of a body is called ………………..
A) retardation
B) deceleration
C) negative acceleration
D) centripetal acceleration
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If the escape velocity of a body on Earth is 11.2 km/s, the escape velocity of the body thrown at an angle 45° with the horizontal will be
Correct option is: (A) 11.2 km/s Escape velocity does not depend on the angle of projection. \(V_{escape} = \sqrt {2gRe} \)
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If the escape velocity of a body on Earth is 11.2 km/s, the escape velocity of the body thrown at an angle 45° with the horizontal will be
2 Answers
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If the speed of an object decreases, the direction of velocity and acceleration are in …………….. direction.
Correct option is A) same
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Direction of acceleration is along the direction of …………….
Correct option is A) velocity
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A body is moving with initial velocity 30 m/s. After certain time it acquires velocity of 40 m/s, then the velocity in middle of its journey is
Correct option is A) 25√2
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Formula a = b × c, says that the net force produces acceleration in a body in the direction of force,
B) Fnet , mass, acceleration
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Assessment (A) : The net force which change only the direction of the velocity of a body is called centripetal force.
A) A and R are true
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In uniform circular motion, which of the following is/are correct i) Net force can change only the direction of the velocity of the body
Correct option is D) i, ii, iii
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Sublimation of Iodine is a (a) Chemical change (b) Physical change (c) Natural change (d) Undesirable change
(b) physical change
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Which of the two-linear velocity or the linear acceleration gives the direction of motion of a body?
Linear velocity.
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