Kinematics (NEET Physics): Questions 136 - 141 of 229

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Passage

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

V = VX2+VY2 tanα = VYVX

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 =- ( 12 ) 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 =- 12 gx2u2

Question number: 136 (2 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ball rolls off top of a stair way with a horizontal velocity u m/s. If the steps are h m high and b meters wide, the ball will just hit the edge of nth step if n equals to

Choices

Choice (4) Response

a.

2hu2gb2

b.

hu2gb2

c.

2u2ghb2

d.

Both c. and a. are correct

Question number: 137 (3 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

Question number: 138

» Kinematics » Uniform Circular Motion

MCQ▾

Question

A particle completes 1.5 revolutions in a circular path of radius 2 cm. The angular displacement of the particle will be - (in radian)

Choices

Choice (4) Response

a.

2 π

b.

6 π

c.

π

d.

3 π

Question number: 139

» Kinematics » Motion in a Plane

MCQ▾

Question

When the angle of elevation of a gun are 60° and 30° respectively, the height it shoots are h1 and h2 respectively, hj/h2 equal to –

Choices

Choice (4) Response

a.

1/3

b.

2/1

c.

1/2

d.

3/1

Question number: 140

» Kinematics » Uniformly Accelerated Motion

MCQ▾

Question

The magnitude of the linear acceleration of the particle moving in a circle of radius 10 cm with uniform speed completing the circle in 4 s, will be –

Choices

Choice (4) Response

a.

2.5 π 2 cm/s 2

b.

2.5π cm/s 2

c.

5 π cm/s 2

d.

5 π 2 cm/s 2

Question number: 141

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A car of 500 kg moving with a velocity of 18 km/hr is stopped by the brake force of 500 N. The distance covered by it before coming to rest is –

Choices

Choice (4) Response

a.

1.44 m

b.

12.5 m

c.

12 m

d.

16.2 m

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