Kinematics (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 60 - 64 of 233

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Question number: 60

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

The three vectors A = 3i-2j + k, B = i-3j + 5k and C = 2i + j-4k form

Choices

Choice (4) Response

a.

isosceles triangle

b.

a right angled triangle

c.

no triangle

d.

an equilateral triangle

Question number: 61

» Kinematics » Velocity-Time Graphs

MCQ▾

Question

The speed of a boat is 5km/h in still water. It crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water is

Choices

Choice (4) Response

a.

4 km/h

b.

1 km/h

c.

5 km/h

d.

3 km/h

Question number: 62

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

If for two vectors A and B, A x B = 0, which of the following is not correct?

(1) They are perpendicular to each other

(2) They act at an angle of 60°

(3) They act at an angle of 30°

(4) They are parallel to each other

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1 and 2 are correct

d.

1, 2 and 3 are correct

Question number: 63

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A particle moves towards east with velocity 5 m/s. After 10 seconds its direction changes towards north with same velocity. The average acceleration of the particle is

Choices

Choice (4) Response

a.

Equation m/s 2 S-W

b.

Equation m/s 2 N-W

c.

zero

d.

Equation m/s 2 N-E

Question number: 64

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A 120 m long train is moving towards west with a speed of 10 m/s. A bird flying towards east with a speed of 5 m/s crosses the train. The time taken by the bird to cross the train will be

Choices

Choice (4) Response

a.

8 sec

b.

14 sec

c.

16 sec

d.

12 sec

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