The force acting on a particle is Fx = (8.00x – 16.0), where Fx is in newtons and x is in meters. What is the network done by this force on the particle as it moves from x = 0 to x = 3.00 m?
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The force acting on a particle is Fx = (8.00x – 16.0), where Fx is in newtons and x is in meters. What is the network done by this force on the particle as it moves from x = 0 to x = 3.00 m?
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- Starting from rest, a 92-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 710 N, and his speed at the bottom of the pole is 3.5 m/s. How far did he slide down the pole?A box with mass m = 1.5 kg is sliding with a speed of 4.0 m/s on a horizontal surface. When at x = 0, it encounters a rough section where the frictional force varies according to the equation f(x)=−(10+40x)f(x)=−(10+40x) where ff is in newtons and x is in meters. How far does this box slide before stopping?300 J of work are required to fully drive a stake into the ground. If the average resistive force on the stake by the ground is 450 N how long is the stake?
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- In a circus performance, a monkey is strapped to a sled and both are given an initial speed of 5.14 m/s up a 22.1∘∘ inclined track. The combined mass of monkey and sled is 29 kg, and the coefficient of kinetic friction between sled and incline is 0.23. How far up the incline do the monkey and sled move?A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.870 m/s encounters a rough horizontal surface of length ℓ = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.351 and he exerts a constant horizontal force of 289 N on the crate. A man pushes a crate labeled m, which moves with a velocity vector v to the right, on a horizontal surface. The horizontal surface is textured from the right edge of the crate to a horizontal distance ℓ from the right edge of the crate. (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude N direction ---Select--- same as the motion of the crate opposite as the motion of the crate (b) Find the net work done on the crate while it is on the rough surface. J(c) Find the speed of the crate when it reaches the end of the rough surface. m/sA single variable force, which is graphed below, is exerted on an object which has a mass of 2.70 kg. If the object is at rest at x=0, what is the speed at the following positions? A) x=5.00 m B) x= 10.0 m C) x= 15.0 m
- An automobile with passengers has weight 16,400 N and is moving at 133 km/h when the driver brakes, sliding to a stop. The frictional force on the wheels from the road has a magnitude of 8,230 N. Find the stopping distance. * 138 m 125 m 116 m 100 mAll I need is the correct letter of answer. 19. A ball thrown vertically upward at 90 ft/s continues to rise for approximately A) 2.8 s B) 5.0 s C) 7.5 s D) 9.2 s 21. Which pair of concurrent forces cannot produce a resultant of 25 N? A) 5 N and 10 N B) 20 N and 20 N C) 20 N and 40 N D)30 N and 5 N 22. Identify the pair having a vector and a scalar quantity. A) force, velocity B) kinetic energy, mass C) acceleration, power D) distance, speed 23. If the mass of an object is doubled, its weight would be A) halved; B) doubled; C) unchanged; D) quadrupled.What is the power developed by the student running the stairs? 1N = 0.225 lb 1 hp = 746 watts a) 0.07 hp b) 1.53 hp c) 0.32 hp d) 0.77 hp