A train starts from rest and accelerates uniformly at 1.5m/s 2 until it attains a speed of 30m/s. Find the time taken and the distance travelled.

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

If steel is more dense that lake water, why can a boat float

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?