Part 8-Motion in a straight line easy

A ball is thrown vertically upward. It has a speed of 10 m/sec when it has reached one half of its maximum height. How high does the ball rise?

Take (g=10m/s²)

A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. What should be the speed of the throw so that more than two balls are in the sky at any time? Given (g=9.8 m/s²)

If a ball is thrown vertically upwards with speed u, the distance covered during the last t seconds of its ascent is

A particle is thrown vertically upward. Its velocity at half of the height is 10 m/s , then the maximum height attained by it (g=10m/s²)

Motion of a particle is given by equation s=(3t³+7t²+14t+8)m. The value of acceleration of the particle at t=1sec is

A car moving with speed of 40km/h can be stopped by applying brakes after at least 2 m . If the same car is moving with a speed of 80 km/h , what is the minimum stopping distance?

A rubber ball is dropped from a height of 5 m on a plane. On bouncing it rises to 1.8 m . The ball loses its velocity on bouncing by a factor of

The position of a particle varies with time, (t) as x=at²-bt³ . The acceleration will be zero at time t is equal to

If a car at rest accelerates uniformly to a speed of 144 km/h in 20 sec , it covers a distance of

A body dropped from a height  with initial velocity zero, strikes the ground with a velocity 3 m/s . Another body of same mass dropped from the same height h  with an initial velocity of 4 m/s . The final velocity of second mass, with which it strikes the ground is

The water drops falls at regular intervals from a tap 5 m above the ground. The third drop is leaving the tap at instant the first drop touches the ground. How far above the ground is the second drop at that instant?

A particle moves along a straight line such that its displacement at any time t is given by s=(t³-6t²+3t+4) m   The velocity when the acceleration is zero is

The velocity of train increases uniformly from 20 km/h to 60 kkm/h  in 4 hours. The distance travelled by the train during this period is

A body dropped from top of a tower fall through 40 m during the last two seconds of its fall. The height of tower is
(g=10m/s²)

A car moves a distance of 200 m. It covers the first half of the distance at speed 40 km/h and the second half of distance at speed v.  The average speed is 48 km/h . The value of v  is

A bus travelling the first one‐third distance at a speed of 10 km/h , the next one‐third at 20 km/h and at last one‐third at 60 km/h . The average speed of the bus is

A car covers the first half of the distance between two places at 40 km/h and another half at 60 km/h . The average speed of the car is