1. Plot a velocity-time graph using the table: Velocity, m/s 0.0 2.5 5.0 7.5 10.0 10.0 10.0 10.0 10.0 Time, s 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Draw a line of best fit and use your graph to find:

 The acceleration during the first 4 seconds; 

The distance traveled in the first 4 seconds;  The distance traveled in the first 5 seconds;

 The average speed during the 8 seconds of motion shown.

2. The diagram below shows a block of wood on a sloping surface.

Copy the diagram and label all the forces that act on the block of wood.

3. A spring stretches from 10 cm to 22 cm when a force of 4 N is applied. If it obeys Hooke’s law, find its total length in cm when a force of 6 N is applied.

4. A rocket has a mass of 500 kg.  What is its weight on Earth, if g = 10 N/kg?  At lift-off the rocket engine exerts an upward force of 25 000 N. What is the resultant force on the rocket?  What is its initial acceleration?

5. A ball is projected vertically upwards with an initial velocity of 30 m/s. Find its maximum height and the time taken to return to its starting point. Neglect air resistance and take g = 10 m/s2 .(Hint: the velocity of the ball is zero at its highest point.)

I NEED SOME HELP PLS I DON'T UNDERSTAND THE PHYSICS! WHY CAN ANYONE CAN NOT HELP ME OUT!