A car of mass 1000kg is travelling at 20m/s when it
collides with a wall.
The front of the car collapses in 0.1 seconds,
by which time the car is at rest.
Calculate the deceleration of the car.
Calculate the force exerted by the wall on the car.

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question