Projectile Motion 1.0

 If two stones projected from the same point with the same speed but at angles  $\frac{\pi}{3}$  and  $\frac{\pi}{6}$  respectively have their ranges R1 and R2 than:

• R1=2R2

• R1=R2

• R1=5R2

• R1=25R2

In projectile motion, if air resistance is ignored, the horizontal motion is at:

• Constant acceleration

• zero acceleration

• variable acceleration

• variable velocity

Two balls A and B are thrown from a running train. Ball A is just dropped while thrown horizontally outwards, which of the two balls that reach the ground first:

• Ball A

• Ball B

• Not enough information

• Both reach at the same time

Which sport does not apply the projectile motion concept?

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A projectile is fired horizontally 2000m above the ground. What is the acceleration experience during the motion?

• 4.5 m/s²

• 9.8 m/s²

• 8.9 m/s²

• 0 m/s²

The horizontal range of a projectile motion depends on the

• Initial velocity and angle of projection

• Acceleration

• Final velocity

• None of the above

A projectile has

• Minimum velocity at the point of projection and maximum at the maximum height

• Maximum velocity at the point of projection and minimum at the maximum height

• same velocity at any point in its path

• Maximum velocity at the point of projection and zero at the maximum height

A ball is thrown at an angle of 30^o to the horizontal. It falls on the ground at a distance of 90 m. If the ball is thrown with the same initial speed at an angle 30^o to the vertical, it will fall on the ground at a distance of

• 120 m

• 27 m

• 90 m

• 30 m

A projectile is thrown with speed 40 m/s at angle  $\theta$  from horizontal. it is found that projectile is at the same height at 1s and 3 s. Wat is the angle of projection?

•  $\tan^{-1}\left(\frac{1}{\sqrt{2}}\right)$  

•  $\tan^{-1}\left(\frac{1}{\sqrt{3}}\right)$  

•  $\tan^{-1}\left(\sqrt{3}\right)$  

•  $\tan^{-1}\left(\sqrt{2}\right)$  

The maximum height attained by a projectile is increased by 10% by increasing its speed of projection, without changing the angle of projection. The percentage increase in the horizontal range will be:

• 20%

• 15%

• 10%

• 5%