9. The "00" NASCAR car driven by Michael McDowell is speeding with 180 miles per hour, which is 80.5 m/s west and the mass of his car is 1600 kg (including the driver and fuel). Calculate the momentum.

6. A watermelon explodes into three equal masses. One mass moves east at 15.0 m/s. If a second mass moves at a velocity of 10.0 m/s 45.0° S of E, what is the velocity of the third mass? (Hint: the total momentum is zero, so how will your vector arrows add up?)

10. An explosion breaks a 34.0-kg object initially at rest into three parts. Part (1) has a mass mı = velocity of 52.0 m/s due west. Part (2) has a mass m2 magnitude of the velocity of part (3)? m/s 5.20-kg and a velocity of 79.0 m/s due north. What is the f60 s 3.80-kg and a 60 ssf6 60 sS

31. Two cars collided at an intersection. Car 1 has a mass of 1460 kg with a velocity of 75 km/h going West. Car 2 has a mass of 1190 kg with a velocity of 100 km/h going North. After collision, the two cars stick together and moved at an angle from the horizontal. Find the value of e and the final velocity of the two cars.

Dr. Knotts's kids are chasing each other through the yard. Arlo is in the lead and Greyson is chasing him from behind. Arlo has a mass of 13.1 kg and is running at 1.06 m S After they run into each other, Greyson has a velocity of 1.14 19.6 kg and is running in the same direction at 1.44 How fast is Arlo moving just after they collide? VArlo m S What is the total kinetic energy of the system before the collision? KEinitial J = What is the total kinetic energy of the system after the collision? KEfinal J = Is this collision considered eleastic, inelastic, or both? O Inelastic Both Elastic m S m S in the same direction he was already moving. I I Greyson has a mass of

During a football game, a receiver has just caught a pass and is standing still. Before he can move, a tackler, running at a velocity of +3.9 m/s, grabs and holds onto him so that they move off together with a velocity of +2.3 m/s. If the mass of the tackler is 125 kg, determine the mass of the receiver in kilograms. Assume momentum is conserved. kg

A 0.145 kg baseball is pitched at 42 m/s to the right. The batter hits it horizontally to the pitcher at 58 m/s.(Zitzewitz et.al., 2006)A. Find the change in momentum of the ball.B. If the ball and bat are in contact for 4.6x10¯ 4 s, what is the average force duringthe contact?

A 1 295.0 kg car traveling initially with a speed of 25.000 m/s in an easterly direction crashes into the back of a 8 900.0 kg truck moving in the same direction at 20.000 m/s. The velocity of the car right after the collision is 18.000 m/s to the east. VTS Before After (a) What is the velocity of the truck right after the collision? (Give your answer to five significant figures.) × m/s east 4.0 (b) What is the change in mechanical energy of the car-truck system in the collision? Your response differs from the correct answer by more than 10%. Double check your calculations. J (c) Account for this change in mechanical energy.

If a rainstorm drops 4 cm of rain over an area of 12 km? in the period of 2 hours, what is the momentum (in kg · m/s) of the rain that falls in nine seconds? Assume the terminal velocity of a raindrop is 10 m/s. (Enter the magnitude. The density of water is 1,000 kg/m3.) kg · m/s