Exercise 2A

A jet plane of mass 30 tonnes touches down with a speed of 55 ms” and comes to rest after moving for 560 m in a straight line on the runway. Assuming that the only forces stopping the plane are provided by the reverse thrust of its two engines, and that these forces are equal and directed opposite to the direction of motion, calculate the magnitude of the thrust in each engine.

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A jet plane of mass 30 tonnes touches down with a speed of 55 ms" and comes to rest after moving for 560 m in a straight line on the runway. Assuming that the only forces stopping the plane are provided by the reverse thrust of its two engines, and that these forces are equal and directed opposite to the direction of motion, calculate the magnitude of the thrust in each engine.

A jet plane of mass 30 tonnes touches down with a speed of 55 ms” and comes to rest after moving for 560 m in a straight line on the runway. Assuming that the only forces stopping the plane are provided by the reverse thrust of its two engines, and that these forces are equal and directed opposite to the direction of motion, calculate the magnitude of the thrust in each engine.

A bullet of mass 0.12 kg is travelling horizontally at 150 m s” when it enters a fixed block of wood. Assuming that the bullet’s motion remains horizontal and that the force resisting motion has constant magnitude 10 000 N. calculate how far the bullet penetrates the block.

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A bullet of mass 0.12 kg is travelling horizontally at 150 m s" when it enters a fixed block of wood. Assuming that the bullet's motion remains horizontal and that the force resisting motion has constant magnitude 10 000 N. calculate how far the bullet penetrates the block.

A bullet of mass 0.12 kg is travelling horizontally at 150 m s” when it enters a fixed block of wood. Assuming that the bullet’s motion remains horizontal and that the force resisting motion has constant magnitude 10 000 N. calculate how far the bullet penetrates the block.

A car of mass of 1000 kg runs out of petrol and comes to rest just 30 m from a garage. The car is pushed, with a force of 120 N, along the horizontal road towards the garage. Calculate the acceleration of the car and find the time it takes to reach the garage.

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A car of mass of 1000 kg runs out of petrol and comes to rest just 30 m from a garage. The car is pushed, with a force of 120 N, along the horizontal road towards the garage. Calculate the acceleration of the car and find the time it takes to reach the garage.

A car of mass of 1000 kg runs out of petrol and comes to rest just 30 m from a garage. The car is pushed, with a force of 120 N, along the horizontal road towards the garage. Calculate the acceleration of the car and find the time it takes to reach the garage.

A boy slides a box of mass 2 kg across a wooden floor. The initial speed of the box is 8 mi s and it comes to rest in 5 m. Calculate the deceleration of the box and find the frictional force between the box and the floor.

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A boy slides a box of mass 2 kg across a wooden floor. The initial speed of the box is 8 mi s and it comes to rest in 5 m. Calculate the deceleration of the box and find the frictional force between the box and the floor.

A boy slides a box of mass 2 kg across a wooden floor. The initial speed of the box is 8 mi s and it comes to rest in 5 m. Calculate the deceleration of the box and find the frictional force between the box and the floor.

A hockey player hits a stationary ball, of mass 0.2 kg. The contact time between the stick and the ball is 0.15s and the force exerted on the ball by the stick is 60 N. Find the speed with which the ball leaves the stick.

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A hockey player hits a stationary ball, of mass 0.2 kg. The contact time between the stick and the ball is 0.15s and the force exerted on the ball by the stick is 60 N. Find the speed with which the ball leaves the stick.

A hockey player hits a stationary ball, of mass 0.2 kg. The contact time between the stick and the ball is 0.15s and the force exerted on the ball by the stick is 60 N. Find the speed with which the ball leaves the stick.

A runaway sledge of mass 10 kg travelling at 15 m s reaches a horizontal snow field. It travels in a straight line before it comes to rest. Given that the force of friction slowing the sledge down has magnitude 60 N, calculate how far the sledge travels in the snow field.

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A runaway sledge of mass 10 kg travelling at 15 m s reaches a horizontal snow field. It travels in a straight line before it comes to rest. Given that the force of friction slowing the sledge down has magnitude 60 N, calculate how far the sledge travels in the snow field.

A runaway sledge of mass 10 kg travelling at 15 m s reaches a horizontal snow field. It travels in a straight line before it comes to rest. Given that the force of friction slowing the sledge down has magnitude 60 N, calculate how far the sledge travels in the snow field.

A particle P of mass m kg is moving in a straight line with constant deceleration. It passes point A with speed 6 ms and point B with speed 3.6 m s. Given that the distance between A and B is 12 m, calculate, in terms of m, the magnitude of the force resisting the motion of P.

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A particle P of mass m kg is moving in a straight line with constant deceleration. It passes point A with speed 6 ms and point B with speed 3.6 m s. Given that the distance between A and B is 12 m, calculate, in terms of m, the magnitude of the force resisting the motion of P.

A particle P of mass m kg is moving in a straight line with constant deceleration. It passes point A with speed 6 ms and point B with speed 3.6 m s. Given that the distance between A and B is 12 m, calculate, in terms of m, the magnitude of the force resisting the motion of P.

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.

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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.

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.