A car moving at 20 m/s crashes into a tree and stops in 0.25 s. Calculate the force the seat belt exerts on a passenger in the car to bring him to a halt. The mass of the passenger is 77 kg. (Enter the magnitude.)

Q: A 970 kg car is puling a 290 kg trailer. Together, the car and trailer have an acceleration of 2.22…

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Q: A motorcycle and rider have a total mass equal to 310 kg. The rider applies the brakes, causing the…

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Q: One elevator is accelerating in the upward direction at 1.5 m/s2 and the other is accelerating…

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Q: The velocity of a 1.7 kg block sliding down a frictionless inclined plane is found to be 1.15 m/s.…

A: Given The mass of the block is m=1.7 kg. The final velocity of the block is vf=4.45 m/s. The…

Q: A 103 kg fullback runs at the line of scrimmage (a) Find the constant force that must be exerted on…

A: Given Data:Mass Distance Time

Q: On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short…

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Q: The figure below shows two blocks connected to each other by a light cord that passes over a pulley…

A: Given: m1=4.4 kgm2=12 kg The surface is frictionless. The free-body diagram is given below.

Q: Mass Ma lies on top of mass Mp, as shown. Assume M, > Mạ. The two blocks are pulled from rest by a…

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Q: A car of mass 972 kg is traveling 24.4 m/s when the driver applies the brakes, which lock the…

A: a)The magnitude of acceleration of the car is,

Q: (a) Assume that your mass is 60 kg. You are inside an elevator standing on an electronic…

A: a)                                              the given mass of the person is 60 kg so the force…

Q: A rocket-sled is shown below. It has 4 rocket engines, each of which generates 1.5 x 103 N of thrust…

A: Given: Thrust force (T) = 1.5 x 103 N            Force of friction (f) = 8.0 x 102 N            Mass…

Q: Commercial airplanes are sometimes pulled out of the passenger loading area by a tractor. (A) And…

A: Force exerted by tractor, F bacward = 1.75 x 104 N Force experienced in resisting motion, F…

Q: A 400-lb object is released from rest 400 ft above the ground and allowed to fall under the…

A:

Q: Suppose the mass of a fully loaded module in which astronauts take off from the Moon is 10,700 kg.…

A: To find:The mass of a fully loaded module is 10,700 kg. The thrust of its engines is 26,500 N. The…

Q: At the airport, you observe some of the jetsas they take off. With your watch you find that it takes…

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Q: motorcycle and rider have a total mass equal to 310 kg. The rider applies the brakes, causing the…

A:

Q: What net external force is exerted on a 1500-kg artillery shell fired from a battleship if the shell…

A: The mass of the artillery shell is, m=1500 kg   The acceleration of the artillery shell is,…

Q: a 18,100-kg jet from 0 to 65 m/s in 2.7 s. (Assume the catapult acts in the positive horizontal…

A: mass of jet = 18100-kg  Initial velocity vi = 0 m/s Final velocity vf = 65 m/s  t = 2.7 s.  To find:…

Q: 68. A rocket of mass 4.5 X 10 kg is accelerating straight up. Its engines produce an upward thrust…

A: According to the Newton's second law , the vertical net acceleration of the rocket is calculated by…

Q: On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short…

A:

Q: Commercial airplanes are sometimes pushed out of the passenger loading area by a tractor. (a) The…

A:

Q: A car of mass 872 kg is traveling 28.9 m/s when the driver applies the brakes, which lock the…

A: Given data:  Mass (m) = 872 kg Initial velocity (V0) = 28.9 m/s, positive x direction  Time (t) =…

Q: A car of mass 972 kg is traveling 27.9 m/s when the driver applies the brakes, which lock the…

A: (a) Consider the initial velocity of the car be u, the final velocity of the car be v., the…

Q: Calculate the horizontal component of the force (in N) the seat and seat belts exert against his…

A: decelerates , a = - 143 m/s2  Mass, m = 70 kg To find = a) Horizontal component .                b)…

Q: A body of mass 10 kg projected at an angle of 30 degrees from the ground with an initial velocity of…

A: Given:-             mass of the body = 10 kg                                angle = 30 deg…

Q: A 200-b object is released from rest 600 ft above the ground and allowed to fall under the influence…

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Q: Commercial airplanes are sometimes pushed out of the passenger loading area by a tractor. (a) The…

A:

Q: Suppose the mass of a fully loaded module in which astronauts take off from the Moon is 11,700 kg.…

A: Given: m=11700kg, F=29000N, g=1.67m/s2 (a) The acceleration of the module in upward direction is :…

Q: A car of mass 922 kg is traveling 23.9 m/s when the driver applies the brakes, which lock the…

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Q: a car of mass 2.0*10^3 kg is initialy moving at 21 m/s when the brakes are applied and the car is…

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Q: An automobile of mass m moves against a retarding drag force F, = -kmv, %3D where v is the velocity…

A: Force acting on automobile by the engine FE. The drag force acting the automobile is Fr=-kmv,…

Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: