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43
Two busses moving at 100 km/h and 80 km/h respectively cross each other while moving opposite direction. Velocity of one bus relative to other bus is:
Correct Answer:D
Explanation:
Relative velocity is the sum of their speeds in opposite directions: 100 + 80 = 180 km/h.
44
Which of the following pair of angles have same range for a projectile?
Correct Answer:B
Explanation:
Complementary angles (e.g., 75° and 15°) yield the same range.
45
The angle of projection of a projectile for which its maximum height and horizontal range equals:
Correct Answer:D
Explanation:
For H = R, the angle θ satisfies tan θ = 4, giving θ ≈ 76°.
46
The explosion of explosive material is application of:
Correct Answer:C
Explanation:
Explosions conserve momentum as internal forces cancel out.
47
Which of the following is the correct definition of variable velocity?
Correct Answer:C
Explanation:
Variable velocity implies changing displacement over equal time intervals.
48
The velocity-time plot for a moving particle shows a straight line. This means:
Correct Answer:A
Explanation:
A straight line on a v-t graph indicates constant acceleration.
49
A man is in a car that is moving with the velocity of 36km/hr. His speed with respect to the car is:
Correct Answer:C
Explanation:
Relative to the car, the man's velocity is zero as he is stationary within the car.