Two titanium spheres approach each other head-on with the same speed and collide elastically. After the collision, one of the spheres, whose mass is 375 g, remains at rest. (a) What is the mass of the other sphere? g (b) What is the speed of the two-sphere center of mass if the initial speed of each sphere is 2.20 m/s? m/s Submit Answer View Previous Question Question 4 of 5 View Next Question

(optional) A skydiver is weighted 72.7 kg, together with his parachute. The acceleration of gravity is 9.80 m/sec². The air resistance force f to the parachute is proportional to the square of velocity, f = bv², with b = 30.0 Nt sec²/m². Find the expression for his falling speed and the numerical value for his landing speed. When he opens the parachute at t = 0, his falling speed is 10 m/s.

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Two masses m1=5 Kg and m2=12 Kg are connected with string and pulled with a force F=25 N that makes an angle of 53° with a smooth horizontal surface as shown in the figure. Find the tension in the string in a unit of Newton. F A. 6.258 B. 8.85 m2 m1 0 C. 2213 D. None E. 4.425

Alice and Bob had car trouble. Their car broke down and Bob could not restart it. Alice got out to push the car and after some time she asked Bob if he would trade jobs with her for a while. Bob answered, "It won't matter if I do. I took physics, and I know that no matter how hard I push on the car, it will push back on me just as hard so I won't accomplish anything. That's Newton's Third Law and it is always true. It has been tested millions of times. It wouldn't matter if I pushed the car. I wouldn't be able to push it anywhere." Aside from the fact that his relationship with Alice is probably fınished, which of the following correctly explains a flaw in Bob's logic? The third law says that the two forces he is talking about are only approximately equal. The third law does not apply in this case because the car is on wheels. O The two forces he is talking about are on two different objects. Thw two forces will not be the same because the two masses are different. The third law only…

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17. A child decides to take her cat on a walk, but the cat does not cooperate. The child pulls on the 2.5 kg cat with force of 20 N in a direction that is 30 degrees above horizontal, and the cat resists being pulled forward with a horizontal force of 15 N. How much force is the child pulling with in the horizontal direction (the direction the cat will move)? Your answer: 10 N O 17 N O 20 N O 600 N

A crane lift a load of bricks of mass 1,750 kg at initial acceleration of 1.64 m/s^2. Calculate the tension in the cable? ?N

F m₁ 8 A 5 kg block is on a 39 degree incline for which uk = 0.1. It is acted on by a horizontal force of 24 N, as shown in the above figure. a) What is the acceelreation of the block if it is moving up the incline? (enter a positive value if the acceleration is directed up the incline, enter a negative value if the acceleration is directed down the incline) m/s² b) If its initial speed is 5 m/s up the incline, how far does it travel in 2 s? m