(1)F(3)(4)The figure shows overhead views of four situations in which forces act on a block thatlies on a frictionless floor. If the force magnitudes are chosen properly, in which situationsare it possible that the block is moving with a constant velocity?Only 2All of them2 and 4None of them

To move the object with a constant velocity it is mandatory that the net force on object should be…

Answered: (1) F (3) (4) The figure shows overhead…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter8: Linear Momentum And Collisions

Section: Chapter Questions

Problem 8PE: Professional Application A car moving at 10 m/s crashes into a tree and stops in 0.26 s. Calculate...

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Professional Application A car moving at 10 m/s crashes into a tree and stops in 0.26 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 70 kg.
A person steps horizontally off the roof of a single-story house that is 3.1 m high. When his feet hit theground below, he bends his knees such that his torso decelerates over a distance of 0.65 m before coming to astop. If the mass of his torso is 50 kg, what is the average net force exerted on his torso over this distance?
Superman must stop a 120-km/h train in 200 m to keep it from hitting a stalled car on the tracks. If the train’s mass is 3 X 105 kg, how much force must he exert? Compare to the weight of the train (give as %). How much force does the train exert on Superman? Solution in handwritten.
As a fish jumps vertically out of the water, assume thatonly two significant forces act on it: an upward force F exertedby the tail fin and the downward force due to gravity. A recordChinook salmon has a length of 1.50 m and a mass of 61.0 kg.If this fish is moving upward at 3.00 m/s as its head first breaksthe surface and has an upward speed of 6.00 m/s after twothirdsof its length has left the surface, assume constant accelerationand determine (a) the salmon’s acceleration and (b)the magnitude of the force F during this interval.
A 3.00-kg block starts from rest at the top of a 30.0° inclineand slides 2.00 m down the incline in 1.50 s. Find (a) theacceleration of the block, (b) the coefficient of kinetic frictionbetween the block and the incline, (c) the frictional force actingon the block, and (d) the speed of the block after it hasslid 2.00 m.
a person in kayak atarts padding, and it accelarates from 0 to 0.474 m/s in a distance of 0.584 m. if the combined mass of the person and the kayak is 69.9kg, what is the magnitude of the net force acting on the kayak?
A high diver of mass 69.8 kg steps off a board 10.0 m above the water and falls vertical to the water, starting from rest. If her downward motion is stopped 2.30 s after her feet first touch the water, what average upward force did the water exert on her?
A boy coasts down a hill on a sled, reaching a level surface atthe bottom with a speed of 7.00 m/s. If the coefficient of frictionbetween the sled’s runners and the snow is 0.050 0 andthe boy and sled together weigh 600. N, how far does the sledtravel on the level surface beforecoming to rest?
The resultant of three coplanar-concurrent forces is 200lb 90°. Determine the value and direction of the third force if F1 = 500lb due W and F2 = 240lb 30° S of W
After falling from rest from a height of 31 m, a 0.60-kg ball rebounds upward, reaching a height of 21 m. If the contact between ball and ground lasted 2.5 ms, what average force was exerted on the ball?

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