18. What force does a trampoline have to apply to a 45.0-kg gymnast to accelerate her straight up at 7.50 m/s ? Note that the answer is independent of the velocity of the gymnast-she can be moving either up or down, or be stationary.

18. What force does a trampoline have to apply to a 45.0-kg gymnast to accelerate her straight up at 7.50 m/s ? Note that the answer is independent of the velocity of the gymnast-she can be moving either up or down, or be stationary.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 49P: A baseball catcher is performing a stunt for a television commercial. He will catch a baseball (mass...

See similar textbooks

Similar questions

What force does a trampoline have to apply to a 45.0-kg gymnast to accelerate her straight up at 7.50 m/s? Note that the answer is independent of the velocity of the gymnast—she can be moving either up or down, or be stationary.
skydiving tunnels have become popular attractions, appealing in part to those who would like a taste of skydiving experience but too overwhelmed by the fear of jumping out of plane at serveral thousand feet. skydiving tunnels are vertical wind tunnel through which air is blown at high speeds allowing visitors to experience body flight. jill decides to try a skydiving tunnel. inside the tunnel she changes her orientation anf for an instant her 68.9kg body momentarily experiences a upward force of air resistance of 455N. determine her acceleration during this moment in time. is it positve or negative?
2. A body with mass m starts at a height h at time r=0 with an initial horizontal velocity vs. If the effect of the wind acting in the opposite direction to its motion is given as a horizontal force F=comi², at what time fa and location x does it hit the ground? T h mo Vo B 18 Т
A box with mass m sits at the bottom of a long ramp thatis sloped upward at an angle a above the horizontal. You give the boxa quick shove, and after it leaves your hands it is moving up the rampwith an initial speed v0. The box travels a distance d up the ramp andthen slides back down. When it returns to its starting point, the speedof the box is half the speed it started with; it has speed v0 /2. What isthe coefficient of kinetic friction between the box and the ramp? (Youranswer should depend on only a.)
What force does a trampoline have to apply to Jennifer, a 45.0-kg gymnast, to accelerate her straight up at 7.50 m/s2 ? The answer is independent of the velocity of the gymnast—she can be moving up or down or can be instantly stationary.
As you catch a 0.14-kg ball it accelerates at −320 m>s2and comesto rest in your hand. What force does the ball exert on your hand?
5.A small rocket with mass 20.0 kg is moving in free falltoward the earth. Air resistance can be neglected. When the rocket is80.0 m above the surface of the earth, it is moving downward with aspeed of 30.0 m/s. At that instant the rocket engines start to fire and producea constant upward force F on the rocket. Assume the change in therocket’s mass is negligible. What is the value of F if the rocket’s speedbecomes zero just as it reaches the surface of the earth, for a soft landing?(Hint: The net force on the rocket is the combination of the upwardforce F from the engines and the downward weight of the rocket.)
What force does a trampoline have to apply to Jennifer, a 45.0-kg gymnast, to accelerate her straight up at 7.50 m/s² ? The answer is independent of the velocity of the gymnast-she can be moving up or down or can be instantly stationary.
need some help here!!
A driver who does not wear a seatbelt continues to move forward with a speed of 18.0 m>s (due to inertia) until somethingsolid like the steering wheel is encountered. The driver now comesto rest in a much shorter distance—perhaps only a few centimeters. Find the magnitude of the net force acting on a 65.0-kg driverwho is decelerated from 18.0 m>s to rest in 5.00 cm.A. 3240 N B. 1.17 * 104NC. 2.11 * 105N D. 4.21 * 105N
. In the movie The Rocketeer, a teenager discovers a jet-powered backpack in an old barn. The backpack allows him to fly at incrediblespeeds. In one scene, however, he uses the backpack to rapidly accelerate an old pickup truck that is being chased by “bad guys.” Hedoes this by bracing his arms against the cab of the pickup and firing the backpack, giving the truck the acceleration of a drag racer. Isthe physics of this scene “Good,” “Bad,” or “Ugly”? Explain.
From a standstill, a 77.0 kg basketball player bends their knees and pushes against the floor andextends legs vertically 30.0 cm before jumping vertically off the ground and reaches a maximumheight of 25.0 inches above the ground. Assume the force the floor exerts on the player is constant.What is the force the floor exerts on the player? Give answer in lbs. (Let 4.45 N = 1 lb., 1 inch = 2.54 cm)