3) Two cars A and B have a mass of 1800 kg and 1200 kg, respectively. Find the original magnitudes of va and vy if the cars collide and then stick together while moving with a common speed of 50 km/h in the direction shown. 50 km/h 30
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- A rocket is fired in a gravity-free environment in deep space. The rocket has an initial mass of 9500 kg and ejects gas with a velocity of 2450 m/s. The rocket fires for 4.40 s. Calculate the mass (in kg) of the gas that must be ejected in the time given to give the rocket an acceleration of 49.50 m/s2In a game of baseball, a 1.0-kg ball is pitched to Sarah at 20 m/s. She hits the ball back to the pitcher at the same speed. If her bat was in contact with the ball for 0.10 s, what is the magnitude of the average force the bat exerted? a) 40 N b) 400 N c) 200 N d) 800 NQuestion 5 Three questions have the same general description. A 2400 kg truck is traveling at 24 m/s and runs into the back of a 1200 kg Mini Cooper. Immediately after the collision, the two cars are stuck together and moving at 22 m/s. What was the average force on the truck if the collision happened in 0.02 seconds? Your answer: O 96 N O 1056 N O 240,000 N O 2,640,000N O 2,880,000N
- 2. A villain with mass 65.0 kg runs at a velocity of 9.26 m/s directly into Chuck Norris' fist moving at a speed of 0.150 m/s. The villain is knocked back at a velocity of 8.52 m/s and angle 20.0° from the horizontal, while Chuck Norris' fist moves at a velocity of 0.0745 m/s and 10.0° from the horizontal. a. What is the mass of Chuck Norris' fist in kg? b. How much kinetic energy is lost in the collision? Vii † Note: This is a silly problem with silly answers! 20° 10°Object A has a mass 4 kg and is traveling to the right at speed 6 m/s. Object B is traveling to the left at 6 m/s. The objects collide head-on, and afterward each has a speed of 6 m/s. Which of the following could be the mass of object B? Select two of the answers below A. 4 kg B. 6 kg C. Negligible compared to 4 kg D. 2 kg