You are driving a motorcycle on a horizontal road. It is moving with a uniform velocity. Is it possible to accelerate the motorcycle without putting higher petrol input rate into the engine?

On complete combustion a litre of petrol gives off heat equivalent to 3 xx 10^(7) J. In a test drive, a car weighing 1200 kg including the mass of driver, runs 15 km per litre while moving with a uniform speed on a straight track. Assuming that friction offered by the road surface and air to be uniform. calculate the force of friction acting on the car during the test drive. if the efficiency of the car engine were 0.5.

A three wheeler starts from rest, accelerates uniformly with 1 ms-2 on a straight road for 10 s and then moves with uniform velocity. Plot the distance covered by the vehicle during the nth second (n = 1, 2, 3, ...) versus n. What do you expect this plot to be during accelerated motion : a straight line or a parabola ?

A car of mass 1000 kg is moving with a velocity 20m /s on a horizontal straight road. If the driver applies brakes to produce a constant breaking force of 5000 Newton, the acceleration of the car i s ..... m / s^(2) .

A car of mass m is driven with acceleration 'a' along a staright level road against a constant external resistive force R' . When velocity of car is v , the rate at which the engine of car is doing work will be ...........

Two particles move in a uniform gravitational field with an acceleration g. At the intial moment the particles were located at one point and moved with velocity v_(1)=1" "ms^(-1)" and "v_(2)=4" "ms^(-1) horizontally in opposite directions. Find the time interval after their velocity vectors become mutually perpendicular