- 15. Suppose a 1000-kg car moves initially at 3m/s, then at 6m/s, then its velocity is (0.5 Points) [4. increasing decreasing 16. Impulse is equal to the product of time and (1 Point)c space impact force momentum velocity
- Question 2 (6 points) You are swimming laps in your local pool, which is 25 m long. You swim 12 laps in 5 minutes. Answer the following questions: 1) How far did you swim? Show your calculations. (1 mark for showing the calculations and 1 for the correct answer) 2) How long, in seconds, did it take you to do the 12 laps? Show your calculations. (1 mark for showing the calculations and 1 for the correct answer) 3) Calculate your velocity during your swim in m/s (Hint: v=d/t) Show your calculations. (1 mark for showing the calculations and 1 for the correct answer)
- 28. A force of 55 Newtons is applied to the north on a 10 kg cart for 52 s. What is the change in momentum? __ If the initial (starting)momentum was 195kgcdot m/s, find the final momentum. __ (2 Points) [4) 2860kg^ast m/s,2665kg^ast m/s 2860kg^ast m/s,3055kg^ast m/s 520kg^3m/s,715kg^ast m/s 520kg^ast m/s,325kg^ast m/s 550kg^ast m/s,745kg^ast m/s 550kg^ast m/s,355kg^ast m/s
- Pure gold has a density of 19.32g/cm^3 How large would a piece of gold be if t had a mass of 318.97 g?
- 6. In an emergency , a car is also required to stop in 1 second (it was travelling 10m/s) . If the car has a mass of 1000kg, how much force must the brakes apply to stop the vehicle?
