We have the following information:  A softball ball has a mass of 0.18kg. The ball was dropped from a distance of one meter above the surface. The ball bounced to a height of 0.29 m. The time before the bounce was 0s and the time after the bounce was 0.73s. Answer: Find the velocity of each ball just before it hits the surface (initial velocity). Why do we only perform this calculation once? Calculate the velocity of each ball just after it hits the surface (end velocity). Find the moment of each ball before it hits the surface (initial moment). Find the moment of each ball after it hits the surface (final moment).

A 1500 kg object moving at 10 m/s collides with a brick wall and comes to a complete stop. If the collision time is 0.05 what was the average stopping force?

A stationary soccer ball of mass m = 0.72 kg is kicked with a constant force of F = 29 N. The woman's foot is in contact with the ball for t = 0.24 s a) Write an expression for the speed of the ball, vi, as it leaves the woman's foot. (b) What is the velocity of the ball right after contact with the foot of the woman?

You and another astronaut are in space.  You throw a tool to them that has a mass of 17kg.  Your mass is 87kg and the other astronaut's mass is 91kg. Initially you and the other astronaut are at rest.  You threw the tool at a speed of 7m/s.  What is the velocity of the astronaut after they catch the tool?

A 1500kg sport car is moving westbound at 20m/s on a level road when it collided with a 4000kg truck driving east on the same road at 15m/s. The two vehicles remain locked together after the collision.   a)what are is the magnitude of the velocity of the two vehicles just after the collision?

A 2,800 kg truck jumps the median and clobbers a 940 kg station wagon in a head-on collision. You are tasked with determining the truck's initial speed for insurance purposes. An observer states that the station wagon was traveling at a speed of 25.1 m/s and that after the collision, the two vehicles stuck together and were moving at a speed of 24.4 m/s in the direction the truck was originally moving. What was the truck's original speed?

A 3.45 kg black ball traveling 4 m/s has a head on collision with a white one at rest. Using the velocities shown, calculate the mass of the white ball, Ignore friction and air resistance. 0 m/s 4 m/s 1.4 m/s 5.7 m/s

Ball #1 mass= 1.0 kg Ball #2 1 velocity = 1.7 m/s K 2 mass= 1.5 kg velocity = 0.0 m/s What is the velocity of Ball #1 after the collision? Give your answer in m/s to 2 significant figures (two decimal places in this case).

A steel ball of mass 3kg is at rest on a table. An exceptionally strong mustached tamarin enters the room and, noticing the ball on the table, picks up a 2kg ball that someone carelessly left lying around and slides it along the frictionless table toward the stationary ball with a velocity of 7.2m/s. After the balls collide, the 2kg ball moves to the left (up in the diagram you are about to draw) at an angle of 32° and the 3kg ball moves at an angle of 27° to the right (down in the diagram you are about to draw). a. Draw and label a diagram (I told you!) of the system described above, without the monkey in it. What kind of collision is this? b. Without using numbers, write the equation for conservation of momentum for the balls in the x- and y-directions separately.  c. Solve the y-equation for velocity v1f, again without using numbers. d. Plug in the numbers to solve your equation in part c for v1f in terms of v2f. Assume m1 is the ball that is thrown. e. Plug your value for v1f into…

During a car collision, the knee, thighbone, and hip can sustain a force no greater than 4000 NN. Forces that exceed this amount could cause dislocations or fractures. Assume that in a collision a knee stops when it hits the car's dashboard. Also assume that the mass of the body parts stopped by the knee is about 20% of the total body mass. The person with a mass of 90 kgkg is initially traveling at 18 m/sm/s (40 mi/hmi/h).  What minimum stopping time interval in needed to avoid injury to the knee?  What is the minimum stopping distance?