A baseball is thrown by the pitcher to the second baseman in an attempt to prevent someone from stealing a base. At some point during this process, your friend says that the sum of the forces exerted on the baseball can be described with the equation ΣF=−mg. Which point during the baseball's motion is your friend referring to? (Neglect air resistance) a. While the second baseman is catching the ball. b. While the pitcher is throwing the ball. c. While the ball is in the air. d. This equation does not describe any part of the ball's trip.

Question 1 Four skydivers jump from a helicopter. Diver C: 100 Kg Diver D: 105 Kg Diver A: 65 Kg Diver B: 85 Kg Assuming that we can neglect air resistance, which diver is falling the fastest and why? All divers are falling at the same rate because the rate at which an object falls is independent of ma ©2021Illuminate Education TM, Inc. hp

An object of mass m = 1.00 kg is observed to have an acceleration of a with a magnitude of 23.6 m/s² in a direction 0 = 63.5° east of north. The figure below shows a view of the object from above. The force F₂ acting on the object has a magnitude of 10.5 N and is directed north. Determine the magnitude and direction of the force F₁ acting on the object. 2 1 N magnitude direction East m F₁

A 1370 kg jeep traveling at 19 m/s can be stopped in 24.0 s by gently applying the brakes. a) What is the average force exerted on the jeep in this case? b) If the driver slams on the brakes, the jeep stops in 2.10 s. What is the average force exerted on the jeep in this case? c) How much time will it take it stop if the driver coasts and lets a 300 N friction force stop the car?

A student is trying to find the force on a person at the top of an inverted roller coaster, where the person is upside down at the top, and writes the equation S + mg = mv 2/r. What would you say about that?   A Yes, that’s correct.   B Close, but it should be written S - mg = mv2/r.   C Close, but it should be written mg - S = mv2/r.

Two objects (m1=11.0 kg and m2=3.00 kg) are separated by 40.0 cm. A third object (m3=1.00 kg) is placed at a location along the line connecting them such that the net force acting on it is zero. By considering the force vectors, this location must be between the two original objects. We will define x as the distance between m1 and m3 and y as the distance between m2 and m3.   1) Find the distance between 11.0-kg object and 1.00-kg object along the line AB where a small, 1.00-kg object could rest such that the net gravitational force on it due to the two objects shown is exactly zero. (Express your answer to two significant figures.)

Two blocks are connected by a massless string which passes through a hole on a frictionless table. A tube extends out of the hole in the table so that the portion of the string between the hole and M1 remains parallel to the top of the table. The blocks have masses M1 = 1.9 kg and M2 = 2.2 kg. Block 1 is a distance r = 0.65 m from the center of the frictionless surface. Block 2 hangs vertically underneath. 1)Assume that block two, M2, does not move relative to the table and that block one, M1, is rotating around the table. What is the speed of block one, M1, in meters per second?  2) how many seconds does it take for M1 to make one revoltuion

At an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 700 m/s2 and the vertical or y component of its acceleration is 750 m/s2. The ball's mass is 0.32 kg. What is the magnitude of the net force acting on the soccer ball at this instant?

A new Dutchman Day activity allows people to leap from the top of the Humanities building onto a giant pillow on the ground below. The distance between the top of the Humanities building and the top of the pillow is 9.34 m. The giant pillow compresses 0.781 m as it brings a 60.7-kg person to rest. Find the magnitude of the force (in N) exerted by the giant pillow on the person. You may assume this force is constant during the time that the person is in contact with the pillow.

A man ( mass = 100 kg) fall freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of .2s. The average force exerted on her by the ground is + 2000 N, where the upward direction is taken to be the positive direction. A) from what height did he just fall? Assume the only force acting on him during the collision is that of the ground. B) suppose instead of the man, a 5 kg rubber ball was dropped from the same vertical distance and the ball bounced back conserving the linear momentum. What would be the velocity of the ball just when it bounced back?