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Velocity, Acceleration. Momentum, Newtons 2nd Law Problems Name__________________ Date: _____ Mod.: _______ 1. What is the speed of a car that travels 150 km in 3.00 hrs? Is the car speeding on 84th st? (1.0 m/s = 2.23 mi/hr) 2. A vehicle travels 2345 m in 315 s toward the evening sun. What is its velocity? 3. What is the speed of a bus that travels 250.0 km in 2.00 hours? 4. What distance will be traveled if you are going 120km/hr for 30. min? 5. How long will it take to go150 km traveling at 50 km/hr? 6. How long will it take to travel 200 km traveling 100 m/s? 7. A ball is moving at 4.5 m/s and has a momentum of 75 kg·m/s. What is the ball's mass? 8. Your brother’s mass is 40.0 kg, and he as a 1.30 kg skateboard. What is the combined momentum of your brother and his skateboard if they are going 8.50 m/s? 9. Your brother’s mass is 55.0 kg, and he as a 2.0 kg skateboard. What is the combined momentum of your brother and his skateboard if they are going 8.50 m/s? 10. A 2.0-kg ball has a momentum of 25 kg·m/s. What is the ball's speed? 11. A 1.0-kg ball has a momentum of 12 kg·m/s. What is the ball's speed? 12. A meteoroid changed velocity from 1.0 km/s to 1.8 km/s in 0.03 seconds. What is the acceleration of the meteoroid? 13 The space shuttle releases a space telescope into orbit around the earth. The telescope goes from being stationary to traveling at a speed of 1700 m/s in 25 seconds. What is the acceleration of the satellite? 14. A runner covers the last straight stretch of a race in 4 s. During that time, he speeds up from 5 m/s to 9 m/s. What is the runner’s acceleration in this part of the race? 15. Falling objects drop with an average acceleration of 9.8 m/s2. If an object falls from a tall building, how long will it take before it reaches a speed of 49 m/s? 16. A man hits a golf ball (0.2 kg) which accelerates at a rate of 20 m/s2. What amount of force acted on the ball? 17. You give a shopping cart a shove down the isle. The cart is full of groceries andhas a mass of 18 kg. The cart accelerates at a rate of 3 m/s2. How much force did you exert on the cart? 18. The wind pushes a paper cup along the sand at a beach. The cup has a mass of 0.025 kg and accelerates at a rate of 5 m/s2. How much force is the wind exerting on the cup? 19. A runner has a mass of 89 kilograms. He produces a force of 84 Newtons between the ground and his running shoes. How fast does he accelerate? 20. Calculate the acceleration of a car if the force on the car is 450 Newtons and the mass is 1300 kilograms. 21. A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec2. What is the mass of the object? 22. A bowling ball rolled with a force of 15 N accelerates at a rate of 3 m/sec2; a second ball rolled with the same force accelerates 4 m/sec2. What are the masses of the two balls? 23. If a 60 kg person on a 15 kg sled is pushed with a force of 300 N, what will be person’s acceleration? 24.A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object.