Physics, 13.11.2020 01:30 mayasofia

1)Will drops a ball on Connor’s foot. How long does the ball take to fall 1m? 2m? Why is the second answer not simply twice the first? 2)Ed flies to Belgium. His aeroplane has a maximum acceleration on the ground of 3.4ms-2. What is the minimum length of runway needed to reach its take off speed of 110ms-1 and how long will this take?

3)Danny likes watching kangaroos. A kangaroo jumps to a vertical height of 2.8m. For how long was it in the air?

4)Charlie likes baseball. A baseball pitcher can release a ball at 40ms-1 after accelerating through a distance of 2.5m. Calculate the average acceleration of the ball.

5)Henry has a good
chance of surviving a car crash with a seatbelt on if her deceleration does not exceed 30g (30x9.81ms-2). Calculate the distance by which the front end of the car must collapse in if a crash occurs at 70mph.

6)Joey travels in a rocket powered sledge and accelerates from rest to 284ms-1 in 5s and then comes to a rest in 1.5s. Calculate his acceleration in both stages.

7)Dan wants to play with the air track. The air track is slightly tilted. He pushes a trolley up the track with a speed of 1ms-1 and its acceleration due to the tilt is 0.5ms-2 down the track. How long does it take to drop 1m below the starting point?

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1)Will drops a ball on Connor’s foot. How long does the ball take to fall 1m? 2m? Why is the second...

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