Physics Test 73...

The equation of a projectile is y = 16x – x²/4. the horizontal range is :

A ball is thrown horizontally from a height of 20m. It hits the ground with a velocity three times its initial velocity. The initial velocity of ball is :-

The horizontal range of a projectile fired at an angle of 15^o is 50 m. If it is fired with the same speed at an angle of 45^o, its range will be

A ball is thrown vertically upwards with an initial velocity of 5 m/sec from point P as shown. Q is point 10 m vertically below the point P. Then the speed of the ball at point Q will be : (take g = 10 m/s² and neglect air resistance )

A person, reaches a point directly opposite on the other bank of a flowing river, while swimming at a speed of 5 m/s at an angle of 120^o with the flow. The speed of the flow must be :-

A man can swim at a speed of 3 km/hr in still water. He wants to cross a 500 m wide river flowing at 2 km/hr. He keeps himself at an angle 120º with river flow while swimming. the time taken to cross the river is :-

A particle is thrown vertically upwards & it returns to the starting point  after 10 sec. then its location after 7 sec. will be same as that after.

A particle's velocity changes from  m/s, to  m/s in 2 sec then acceleration of particle is :-

In a car race car A takes 't₀' time less to finish than car B and passes the finishing point with velocity V₀ more than car B. The cars  start from rest and travel. with constant acceleration a₁ & a₂. Then the ratio  is equal to :-

In 1-D motion due to constant positive acceleration :-