A century-old platter falls vertically downward. Upon breaking, its fragments fly off parallel to the ground with velocity 123 m/s and v2 - 64 m/s. Find mass ml and mass m2 in kg 25.0 45.0 -1.30 3.07 mis Select one a ml - 13057; m2 - 0 2805 Ob. ml- 02805, m2 - 1.3057 Oc ml - 0.65; m2 - 022 d. ml - 13057, m2 - 0.1683

6. A 200 g whistle firecracker is set and fired horizontally in a straight line on top a smooth platform. Its speed is 1.654 m/s in0.35 seconds. a) What is the momentum ? b) The force in that time.

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

A net force of 15 N exerted on a wooden block produces an acceleration of 5 m/s. The mass of the wooden block is O a. 0.333 kg O b. 75 kg O c. 3 kg O d. 10 kg A 425g football is having a momentum 8.5kgm/s, south. The velocity of the football is O a. 20m/s, North O b. 20m/s, South O c. 3.61m/s, South O d. 3.61m/s, North If the normal force (N) acting on the object in the figure is 75 N, the mass (m) of the object is

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.

A 1.10 kg falcon catches a 0.120 kg dove from behind in midair. What is their velocity (in m/s) after impact if the falcon's velocity is initially 20.0 m/s and the dove's velocity is 8.00 m/s in the same direction? (Enter the magnitude.) m/s Additional Materials O Reading

. The linear impulse (I) of the force F= (3t) N for t= 4 seconds is: a. 40 N.m b. 20 N.m c. 16 N.m d. 12 N.m k= 10 N/m F= (3t) N

It fires a 0.015 kg bullet at 430 m/s (relative to the ground). .(alíi) A 5.8 kg rifle is initially at rest but free to recoil After firing, the velocity of the rifle (relative to the ground) is m/s 1.11- .a O m/s 166266.67-.b O m/s 2.21-.c O m/s 1.11.d O

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.