Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 47

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In the figure shown, the two projectiles are fired simultaneously. Find the minimum distance between them during their flight.

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Important Questions on Kinematics

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Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 48

A stone is projected from a point on the ground in such a way so as to hit a bird at height

3 h

and could attain a maximum height

4 h

above the ground. If at the instant of projection, the bird flies away horizontally with speed

10 m s^{- 1}

and the stone still hits the bird while descending, then the horizontal velocity of stone is
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Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 49

What is the ratio of potential energy with respect to ground, and kinetic energy at the topmost point of the projectile motion?

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Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 50

A projectile is thrown into space so as to have the maximum possible horizontal range equal to

400 m

. Taking the point of projection as the origin, the coordinates of the point where the velocity of the projectile is minimum are

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Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 51

Two particles are projected from the same point with the same speed, at different angles

θ_{1}

and

θ_{2}

to the horizontal. They have the same horizontal range. Their time of flights are

t_{1}

and

t_{2}

, respectively. Choose the incorrect option.

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Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 52

In uniform circular motion,

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Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 53

Two racing cars of masses

m_{1}

and

m_{2}

are moving in circles of radii

r

and

2 r

respectively and their angular speeds are equal. The ratio of the time taken by cars to complete one revolution is:

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Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 54

Let

a_{r}

and

a_{t}

represent radial and tangential acceleration. The motion of a particle may be circular if:

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Physics Crash Course JEE Main>Chapter 2 - Kinematics>Level 1>Q 55

A stone of mass

m

tied to a string of length

l

is rotated in a circle with the other end of the string as the centre. The speed of the stone is

v

. If the string breaks, the stone will move