Kinematics-Motion in a Plane (NEET Physics): Questions 11 - 15 of 15

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Question number: 11

» Kinematics » Motion in a Plane

MCQ▾

Question

The height y and the distance x along the horizontal at plane of the projectile on a certain planet (with no surrounding atmosphere) are given by y = (8t - 5t2) metre and x = 6t metre where t is in second. The velocity with which the projectile is projected is

Choices

Choice (4) Response

a.

6 m/s

b.

8 m/s

c.

10 m/s

d.

Data is insufficient

Question number: 12

» Kinematics » Motion in a Plane

MCQ▾

Question

A projectile is thrown at an angle 0 and (90° - 0) from the same point with same velocity 98 m/s. The heights attained by them, if the difference of heights is 50 m will be (in m)

Choices

Choice (4) Response

a.

270, 220

b.

200, 150

c.

250, 200

d.

300, 250

Question number: 13

» Kinematics » Motion in a Plane

MCQ▾

Question

A particle is moving in a plane with a velocity given by, u = u0 i + (∞a cos ∞t) j, where i and j are unit vectors along x and y-axes respectively. If the particle is at the origin at t = 0, then its distance from the origin at time t = 3π/2∞ will be

Choices

Choice (4) Response

a.

((4πu02ω)2+a2)

b.

((3πu02ω)2+a2)

c.

((3πu02ω)+a2)

d.

((3πu02ω)2+a)

Question number: 14

» 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: 15

» Kinematics » Motion in a Plane

MCQ▾

Question

A man whirls a stone round his head on the end of a string 4.0 metre long. Can the string be in a horizontal, plane? If the stone has a mass of 0.4 kg and the string will break, if the tension in it exceeds 8 N. The smallest angle the string can make with the horizontal and the speed of the stone will respectively be (Take g = 10 m/sec 2)

Choices

Choice (4) Response

a.

45°, 8.2 m/s

b.

60°, 7.7 m/s

c.

60°, 8.7 m/s

d.

30°, 7.7 m/s

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