Kinematics-Average Speed and Instantaneous Velocity (NEET Physics): Questions 58 - 63 of 108

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Question number: 58

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ship is steaming towards east at a speed of 10 ms -1. A woman runs across the deck at a speed of 8 ms -1 in the direction at right angles to the direction of motion of the ship i. e. towards north. What is the velocity of the woman relative to sea?

Choices

Choice (4) Response

a.

11.64 m/s

b.

17 m/s

c.

12.806 m/s

d.

17.506 m/s

Question number: 59

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A train has to negotiate a curve of radius 400 m. By how much should the outer rail be raised with respect to inner rail for a speed of 48 km/hr. The distance between the rails is 1 m.

Choices

Choice (4) Response

a.

12 m

b.

12 cm

c.

4.5 m

d.

4.5 cm

Passage

Read the passage given below and answer the questions that follows:

Three of the fundamental constants of physics are the universal gravitational constant, G = 6.7 x 10 Wkg-V2, the speed of light, c - 3.0 x 108 m/s, and Planck’s constant, ft = 6.6x 10 - 34 Js-1. Two particles A and B are projected in the vertical plane with same initial velocity u0 from part (0, 0) and (, -h) towards each other as shown in figure at t = 0.

Graph of projection of A and B particles

Graph of Projection of a and B Particles

Projection of two particle A & B in vertical plane

Question number: 60 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The time when separation between A and B is minimum is

Choices

Choice (4) Response

a.

l2u0cosθ

b.

2lu0cosθ

c.

2hg

d.

Xu0cosθ

Question number: 61 (2 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The path of particle A with respect to particle B will be -

Choices

Choice (4) Response

a.

Straight line parallel to y-axis

b.

Straight line parallel to x-axis

c.

parabola

d.

None of the above

Question number: 62 (3 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Minimum distance between particle A and B during motion will be-

Choices

Choice (4) Response

a.

l+h

b.

l2+h2

c.

l

d.

h

Question number: 63

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A boy standing on a weighing machine observes his weight as 200 N. When he suddenly jumps upwards, his friend notices that the reading increased to 400 N. The acceleration by which the boy jumped will be

Choices

Choice (4) Response

a.

9.8 m/s 2

b.

29.4 m/s 2

c.

4.9 m/s 2

d.

14.7 m/s 2

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