The 75 kg student in (Figure 1) balances a 1200 kg elephant on a hydraulic lift. For help with math skills, you may want to review: Rearrangement of Equations Involving Multiplication and Division Figure 1 of 1 Part B When a second student joins the first, the height difference between the liquid levels in the right and left pistons is 35 cm. What is the second student's mass? Express your answer with the appropriate units. ► View Available Hint(s) m = 56.5 μА kg ?

An 70 kg basketball player lands from a jump and tries to stop her forward motion or momentum. The normal contact force exerted by the floor on her shoes is 2800 N. The frictional force exerted by the floor on her shoes is 800 N and this force acts posteriorly on the player.  There was minimal medial-lateral force during the landing and so this component of the ground reaction force can be ignored. What is the resultant ground reaction force exerted by the floor on the basketball player's shoes?  How many times greater than the player's body weight is this resultant ground reaction force calculated in part a)?

A tennis ball is flying east towards the wall with a speed of 40.3 m/s. After bounced against the wall, it's flying west with a speed of 28.2 m/s.  If the mass of the ball is 0.1 kg, and the time of collision with the wall is 0.033 second, what is the magnitude of force on the wall during this process in unit of Newton?

(a)  Cynthia is in a boat heading due east at 15 m/s and is reading a book.  She then finishes the book and throws her book off the back of the boat at a speed of 6 m/s due west.  What is the boat’s speed after Cynthia throws the book if the book as a mass of 4 kg and Cynthia and the boat combined have a mass of 700 kg? (b)  To demonstrate your ability to carry out deductive reasoning in the context of PC 141, determine the how the velocity of the boat after Cynthia throws the book would change if the book’s mass triples. Does your answer in question #2 above seem reasonable?  Briefly explain why or why not?

Four arrows, all with the same shape and size, are shot directly upward. Ignore the effect of air resistance, but the arrows have different masses and are fired with different speeds. Rank them from highest to lowest in terms of the greatest height that they will reach. (Use only ">" or "=" symbols. Do not include any parentheses around the letters or symbols.) 0.0750 kg, vinitial = 18.0 m/s 0.125 kg, Vinitial A. mass = %3D B. mass = 16.0 m/s C. mass = 0.0500 kg, Vinitial 20.0 m/s D. mass = 0.100 kg, vinitial = 22.0 m/s

Hello, can you also please include the formula that you used to solve this problem? Thank you!

A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 740 N on him. The mass of the losing player plus equipment is 88 kg, and he is accelerating at 1.8 m/s2 backward. Randomized Variables: f = 740 Nm1 = 88 kgm2 = 118 kga = 1.8 m/s2                                                        1. What is the magnitude of the force of friction, in newtons, between the losing player's feet and the grass as he slides backwards? F1 =                           2. What is the magnitude of the force, in newtons, that the winning player exerts on the ground to move forward if his mass plus equipment is 118 kg? Assume the second player has the same acceleration as the first. F2=

Michael fell asleep while driving home from school. His 1255 kg car hit a guardrail while moving at 15.98 m/s. The guardrail exerted a 6.110E4 N force on the car for 0.1233 s. After the car hit the guardrail, how fast was it moving?

A high-speed photograph of a club hitting a golf ball is shown in the figure below. The club was in contact with a ball, initially at rest, for about 0.0024 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 1.9 x 102 ft/s, find the average force (in kN) exerted on the ball by the club. kN

After falling from rest from a height of 31 m, a 0.40-kg ball rebounds upward, reaching a height of 21 m. If the contact between ball and ground lasted 2.3 ms, what average force was exerted on the ball? (Enter the magnitude.) N