A man pushes a car with a force of 127.5 N along a straight horizontal road. He manages to increase the speed of the car from 1 ms to 2.8 ms in 12s. Find the mass of the car.
Two children are sliding a box to each other on a frozen lake. The box, of mass 0.4 kg, leaves one child with speed 5 ms and reaches the other, who is 8 m away, after 2.5s. Calculate the deceleration of the box, and find the frictional force resisting the motion of the box.
A wooden block of mass m kg is at rest on a table, 1.6 metres from an edge. The block is pulled directly towards the edge by a horizontal string.
A water-skier is being towed by a motor-boat. Given that her acceleration of 0.8 m s is provided by a force of 52 N, calculate her mass.
For the first stage of its motion on the runway, before take-off, an aircraft of mass 2200 kg has a constant acceleration of 4.2 m s2.
A van is pulling a broken-down car of mass 1200 kg along a straight horizontal road. The only force acting on the car which affects the motion of the car is the tension in the horizontal towbar. Calculate the acceleration of the car when the tension is 750 N.
The engine of a car of mass 800 kg which is travelling along a straight horizontal road, is producing a driving force of 1200 N.
