A 1,500-N crate is being pushed across a level floor at a constant speed by a force F of 370 N at an angle of 20.0° below the horizontal, as shown in the figure a below.

Two crates of fruit  are released from the top of a ramp inclined at 30 degrees from the horizontal and 4.5 meter long. The two crates consist of  an apple crate of mass 20 kg that is placed in front of a watermelon crate of mass 80 kg.  The apple crate has a coefficient of friction of 0.20 while the watermelon crate has a coefficient of friction of 0.15. How long does it take the apple crate to reach the bottom of the incline if it needs to travel a distance of 4.5 meters?

Three identical balls (ball 1, ball 2, and ball 3) are thrown at the same speed from the top of the same building.  Ball 1 is thrown downward at 45 ° below the horizontal, ball 2 is thrown horizontally, and ball 3 is thrown upward at 45 ° above the horizontal.  Which ball is going fastest just before it hits the level ground below the building (i.e., has the largest impact speed)?  Assume air drag on the balls is negligible.

A man pushing a crate of mass m= 92.0 kg at a speed of v 0.860 m/s encounters a rough horizontal surface of length t=0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.357 and he exerts a constant horizontal force of 286 N on the crate. (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude direction --Select- (b) Find the net work done on the crate while it is on the rough surface. (c) Find the speed of the crate when it reaches the end of the rough surface. m/s

The man slides the 180-lb crate across the floor by pulling with a constant force of 30 lb. If the crate was initially at rest, how far will the crate move before its speed is 4.0 ft/s? The coefficient of kinetic friction between the crate and the floor is 0.15.

In the figure, two blocks are connected over a pulley. The mass of block A is 6.20 kg and the coefficient of kinetic friction between A and the incline is 0.390. Angle 8 of the incline is 47.0°. Block A slides down the incline at constant speed. What is the mass of block B? Frictionless, massless pulley Number Units

A man pushing a crate of mass  m = 92.0 kg  at a speed of  v = 0.875 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 0.354 and he exerts a constant horizontal force of 292 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     (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/s

A block is being pushed with a force of 10 N at a downward angle of 60 degrees below the horizontal.   The coefficient of static friction is 0.6.  Is this enough to make a block of 800 g move?

A box slides from rest from point A down a plane inclined 30 degrees to the horizontal. After reaching the bottom of the plane, the box moves on the horizontal floor at a distance of 2 m before coming to rest. If the coefficient of friction between the box and plane and between the box and floor is 0.40, what is the distance of point A from the intersection of the plane and the floor? A 2.62 m в) 5.95 m 5.21 m 5.62 m E 4.87 m

A block with mass m = 6 kg is being pulled on a frictionless horizontal surface by a force F a distance OA = d. This force has a magnitude F = 10 N and a direction 0 = 30° above the horizontal. If the speeds at points O and A are vo = 2 m/s and VA = 5 m/s respectively, then the distance OA-d covered by the block will be equal to: F 0 = 30° Vo = 2 m/s O 20.785 m 34.594 m 13.653 m 3.637 m 7.275 m O d = ? VA A