a 400 N block slides on a horizontal plane by applying a horizontal force of 200 N and reaches a velocity of 20 m/s in a distance of 30 m. from rest. compute the coefficient of friction between the floor and the block.

A car is traveling at 51.0 km/h on a flat highway. (a) If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? (b) What is the stopping distance when the surface is dry and the coefficient of friction is 0.600?

An object moves with an initial speed of 5.01 m/s. It then enters a region with friction causing the object to come to rest after moving 2.56 m. What is the coefficient of friction?

A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 25.0° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 55.0 kg , and the coefficient of kinetic friction between the skis and the snow is 0.120. Find the magnitude of the force that the tow bar exerts on the skier.

In the figure, a block of mass m = 3.71 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of magnitude F = 12.7 N at an angle 0 = 26.0°. (a) What is the magnitude of the block's acceleration? (b) The force magnitude F is slowly increased. What is its value just before the block is lifted (completely) off the floor? (c) What is the magnitude of the block's acceleration just before it is lifted (completely) off the floor? (a) Number i Units (b) Number i Units (c) Number i Units > >

The box below has been given an initial velocity of 2.60 m/s directed up the ramp. The angle the incline makes with the horizontal is 34.0°. The coefficient of static friction between the box and the ramp is 0.430 while the coefficient of kinetic friction between the box and the ramp is 0.280. Use g = 9.80 m/s2. (a) Calculate the magnitude of the box's acceleration while it is sliding up the ramp. m/s2 (b) How far (measured parallel to the incline) does the box travel before coming instantaneously to rest? m (c) After the box comes instantaneously to rest on the ramp, it then either starts sliding down, or remains at rest. Either enter 0, if you determine that the box remains at rest, or calculate the magnitude of the box's acceleration while it is sliding back down the ramp. m/s2

A box of mass m = 25 kg slides with an initial speed v0 = 7.0m/s up a slope which forms the angle = 12° relative to the horizontal. A strong wind is blowing with fixed horizontals force Fv = 50N to the right (see figure). The coefficient of friction in motion is uk = 0.18. (a) What is the transverse force acting on the box from the slope? (b) How far, L, does the box slide up the slope before it stops? (c) What must be the minimum coefficient of friction at rest, us, for the box to slide not back down the hill? F₁ m Vo L D

Problem 2: The 300 metric tonne jet airliner has four engines, each of which produces a nearly constant thrust of 180 kN during the takeoff roll. Determine the length s of runway required if the takeoff speed is 220 km/hr. Compute s first for an uphill takeoff direction from A to B and second for a downhill takeoff from B to A on the 0.5° Horizontal slightly inclined runway. Neglect air and rolling resistance. Ans. (a) S-807 m (b) sF751 m

A box has a mass of 31 kg. A force of 163 N is applied to it at an angle of 45º. An object moves along a surface 15 m with a coefficient of kinetic friction of 0.09 and where its initial velocity is equal to 16 meters/sec. along this path: Determine the magnitude of the friction force.

A person pushes horizontally with a force of 200. N on a 56.0 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.19. (a) What is the magnitude of the frictional force? (b) What is the magnitude of the crate's acceleration?