Kinematics-Average Speed and Instantaneous Velocity (NEET Physics): Questions 42 - 46 of 108

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Question number: 42

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A car driver is negotiating a curve of radius 200 m with a speed of 15 km/hr. The angle through which he has to lean from the vertical will be –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 43

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A particle is moving in a circular path with velocity varying with time as v = 1.5t-+ 2t. If the radius of circular path is 2 cm. the angular acceleration at t = 2 sec will be –

Choices

Choice (4) Response

a.

400 rad/sec 2

b.

4 rad/sec 2

c.

0.4 rad/sec 2

d.

40 rad/sec 2

Question number: 44

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A particle moves in a circle of radius 10cm with a linear speed of 20m/s. The angular velocity will be –

Choices

Choice (4) Response

a.

25 rad/s

b.

75 rad/s

c.

50 rad/s

d.

200 rad/s

Question number: 45

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

The angular speed with which the earth would have to rotate on its axis so that a person on the equator would weigh (3/5) th as much as present, will be: (Take the equatorial radius as 6400 km)

Choices

Choice (4) Response

a.

7.8 x 10 3 rad/sec

b.

7.8 x 10 4 rad/sec

c.

8.7 x 10 3 rad/sec

d.

8.7 x 10 4 rad/sec

Passage

Velocity at a general point P (x, y) for a horizontal projectile motion is given by

V = Equation Equation = Equation

The image is velocity graph.

The Image Is Velocity Graph.

here in following fig we shows that the projectile motion of particle at some point to another point.

α is angle made by v with horizontal in clockwise direction Trajectory equation for a horizontal projectile motion is given by x = v x t = ut

y =- ( Equation ) gt 2

Picture display is velocity graph.

Picture Display Is Velocity Graph.

here in fig we shows that angle α made by v with horizontal in clockwise direction

Eliminating t, We get y =- Equation Equation

Question number: 46 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

An aeroplane is flying horizontally with a velocity of 720 km/h at an altitude of 490 m. When it is just vertically above the target a bomb is dropped from it. How far horizontally it missed the target?

Choices

Choice (4) Response

a.

2000 m

b.

200 m

c.

1000 m

d.

100 m

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