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!

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Fill in the blanks with the numbers is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance