2. A sticky 6kg lump of clay moves toward the East at 2 m/s. A second ball of clay of 2kg moves to the West at 10 m/s. When the two collide and stick together, what is their combined final speed? Conservation of Momentum Practice

3. A sticky 50g lump of clay moves toward the East at 4 mph. Another 20g ball of clay also moves to the East at 2 mph. When the two collide and stick together, what is their combined final speed?

4. Mathematical Motion The numbers and formulae behind the pictures

5. A 30 kg box sits on a frictionless surface. If the box is pushed from rest with a 90N force how far will it move after 5 seconds?

6. A dog runs away from a ferocious Siamese cat at a rate of 180 meters per minute. The cat chases the dog for five minutes before giving up catching the dog. How far was the chase?

7. A resting dog, scared by a ferocious Siamese cat, runs away and gets to top speed of 180 meters per minute in 5 minutes at which time the cat gives up catching the dog. How far was the chase?

8. A 150N force is applied to a 25 kg box at rest. After 5 seconds the box has moved 50 meters. What is the frictional force?

9. “Slowing Down:” A car traveling west changes speed from 25 m/s to 10 m/s in 5 minutes. What is the acceleration of the car?

10. A rock falls from rest and attains a speed of 39.2 meters per second after 4 seconds of falling. What is the acceleration of the falling rock?

11. A car accelerates at 3 m/s 2 for 10 seconds. If the initial speed of the car was 5 m/s, how far did it travel during those 10 seconds?

12. A cat is dropped from a tall building and hits the ground 5 seconds later. (a) How fast is the cat moving when it hits the ground? (b) How far did the cat fall?

13. A 10 kg box is pulled by a 50 N force against a 15 N force of friction. The box starts from rest and is pulled 8 meters. What is the acceleration of the box? How long does it take to go the 8 meters? What is its final velocity?