Kinematics-Average Speed and Instantaneous Velocity (NEET Physics): Questions 48 - 52 of 108

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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: 48 (3 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

An aeroplane is in a level flying at an speed of 144 km/hr at an altitude of 1000 m. How far horizontally from a given target should a bomb be released from it to hit the target?

Choices

Choice (4) Response

a.

471.34 m

b.

671.43 m

c.

371.34 m

d.

571.43 m

Question number: 49

» 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

Question number: 50

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A train has to negotiate a curve of radius 600 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 2 m.

Choices

Choice (4) Response

a.

12 m

b.

12 cm

c.

4.5 m

d.

4.5 cm

Question number: 51

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A body of mass 0.02 kg falls from a height of 5 meter into a pile of sand. The body penetrates the sand a distance of 5 cm before stopping. What force has the sand exerted on the body?

Choices

Choice (4) Response

a.

1.96 N

b.

-0.196 N

c.

-19.6 N

d.

0.0196 N

Question number: 52

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Two bodies P and Q are moving along positive x-axis their position-time graph is shown below. If VPQ is velocity of P w. r. t. Q and VQP is velocity of Q w. r. t P, then

Select the correct answers and mark it according to the following codes:

(1) (VPQ)=(VQP)=constant

(2) VPQtowardsorigin

(3) VQPtowardsorigin

(4) (VPQ)(VQP)=constant

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

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