Discuss the below:
Q1. A car starts from rest and reaches a speed of 31m/s in 2 seconds. Calculate its acceleration, if this value stays the same then what it the speed 7 seconds later?
Q2. A ball is thrown off a very tall building with a velocity of 16 m/s. What is the speed of the ball after 1.1 second. Remember that the ball falls with an acceleration of 9.8m/s2 towards the earth.
Q3. A child's cubic play block has a mass of 76g and sides of 9cm. What is the density of the block? Will the block sink or float?
Q4. A 33 kg girl who is running at 3m/s jumps on a 12kg stationary sled on a frozen lake. How fast does the sled with the girl then move?