Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 190

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Which of the following velocity-time graphs shows a realistic situation for a body in motion

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Important Questions on Kinematics

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 191

When a ball is thrown up vertically with velocity

v_{0},

it reaches a maximum height of

h .

If one wishes to triple the maximum height, then the ball should be thrown with velocity.

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 192

A particle is thrown above, then correct

v - t

graph will be

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 193

A particle is thrown vertically upwards. The graph between its speed

v

and time

t

is given by (neglecting the air resistance) the following figure:

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 194

In $1.0 \sec$ a particle goes from point $A$ to point $B$ moving in a semicircle of radius $1.0 m .$ The magnitude of average velocity is

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 195

A motorcycle is moving with a velocity

80 km {hr}^{- 1}

ahead of a car moving with a velocity of

65 km {hr}^{- 1}

in the same direction. What is the relative velocity of the motorcycle with respect to the car-

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 196

$50 m$ long trains are crossing each other in opposite direction with velocity of $10 m s^{- 1}$ and $15 m s^{- 1}$ respectively. Then time-taken by trains to cross each other will be

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 197

Thief's car is moving with a speed of

10 m s^{- 1} .

A police van chasing this car with a speed of

5 m s^{- 1}

fires a bullet at the thief's car with muzzle velocity

72 km h^{- 1} .

Find the speed with which the bullet will hit the car-

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Alpha Question Bank for Medical: Physics>Chapter 4 - Kinematics>Exercise-1>Q 198

A person standing on the floor of an elevator drops a coin. The coin reaches the floor of the elevator in a time

t_{1}

if the elevator is stationary and in time

t_{2}

if it is moving with constant velocity, Then-