A fast bowler takes a run -up before bowling a ball.

Give scientific reasons: A fast bowler takes a longer start while bowling.

An athelete runs a certain distance before taking a long jump . Why ?

An aeroplane taxies on the runway for 30 s with an acceleration of 3.2 m//s^2 before taking off. How much distance would it have covered on the runway?

One tank can be filled up by two taps in 6 hours. The smaller tap alone takes 5 hours more than the bigger tap alone. Find the time required by each tap to fill the tank separately.

One tank can be filled up by two taps in 6 hours. The smaller tap alone takes 5 hours more than the bigger tap alone. Find the time required by each tap to fill the tank separately.

A circket ball of mass m is bowled at a batsman and gets to the bat travelling at v m/s. The batsman hits the ball and it leaves his bat after t seconds at a speed of v/2 m/s. The magnitude of the force on the ball in newtons is

A thief is running away on a straight road in jeep moving with a speed of 9 m s^-1 . A police man chases him on a motorcycle moving at a speed of 10 ms^-1 . If the instantaneous separation of the jeep from the motorcycle is 100 m, how long will it take for the police to catch the thief?

Fill in the blanks : The motion of an aeroplane on the runway before take-off is _____ .

A stone thrown vertically upwards with initaial velocity u reaches a height 'h' before coming down.Show that the time takes to go up is same as time taken to come down

A bag contains 3 red, 3 white and 3 green balls. One ball is taken out of the bag at random. What is the probability that the ball picked up is red.