Calculate the magnitude of the normal force on a 17.7 kg block in the following circumstances. (Enter your answers in N.)  The block is on a level surface and a force of 165 N is exerted on it at an angle of 40.8° above the horizonta

A 3.39kg block is pulled across a floor by a 16.25 N force. The coefficients of static and kinetic friction are 0.4 and 0.2. What is the speed of the block after 2.33 m?

A box with a mass of 7.24 kg is held at the top of frictionless inclined plane of length L = 10.9 m and an inclination angle 0 = 26.9 degrees above the horizontal. The box is released from rest and stops at a distanced = 22.62 m from the bottom of the inclined plane along the rough horizontal surface. What is the coefficient of kinetic friction between the box and the rough horizontal surface?

Current Attempt in Progress The figure shows a cold package of hot dogs sliding rightward across a frictionless floor through a distance d = 22.0 cm while three forces act on the package. Two of them are horizontal and have the magnitudes F₁ = 8.0 N and F₂ = 2.0 N; the third is angled down by = 60.0° and has the magnitude F3 = 7.0 N. (a) For the 22.0 cm displacement, what is the net work done on the package by the three applied forces, the gravitational force on the package, and the normal force on the package? (b) If the package has a mass of 4.0 kg and an initial kinetic energy of 0, what is its speed (in m/s) at the end of the displacement? (a) Number i (b) Number Units Units Hot Dogs Ve F F d

The ball launcher in a pinball machine has a spring that has a force constant of 50.0 N/m. The surface on which the ball moves is inclined 10.0° with respect to the horizontal. The spring is initially compressed 5.00 cm. Find the distance along the incline that the ball will go to (from the mean position of the spring), if the friction force = 0.1N. Mass of the ball = 20 gram.

A 1,040-N crate is being pushed across a level floor at a constant speed by a force  F  of 390 N at an angle of 20.0° below the horizontal, as shown in the figure a below. Two figures show a side view of a crate positioned upon a horizontal surface. Figure (a): An arrow pointing downward and to the right is labeled vector F and forms an angle of 20° below the horizontal as it approaches the upper left edge of the crate. Figure (b): An arrow pointing upward and to the right is labeled vector F and forms an angle of 20° above the horizontal as it extends from the upper right edge of the crate. (a) What is the coefficient of kinetic friction between the crate and the floor? (Enter your answer to at least three decimal places.)(b) If the 390-N force is instead pulling the block at an angle of 20.0° above the horizontal, as shown in the figure b, what will be the acceleration of the crate? Assume that the coefficient of friction is the same as that found in part (a).

A man pushing a crate of mass m = 92.0 kg at a speed of  v = 0.880 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 297 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                                                       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

The force acting on a particle varies as in the figure below. (The x axis is marked in increments of 0.500 m.) A coordinate plane has a horizontal axis labeled x (m) and a vertical axis labeled Fx (N). There are five points, connected by straight lines in order from A to E. Point A is at (0,0).  Point B is at (2,6).  Point C is at (4,0).  Point D is at (5,−3).  Point E is at (6,0). Find the work done by the force as the particle moves across the following distances. (a) from x = 0 m to x = 4.00 m J (b) from  x = 4.00 m to x = 6.00 mJ(c) from x = 0 m to x = 6.00 mJ

A 61.9-kg circus performer is fired from a cannon that is elevated at an angle of 57.3 ° above the horizontal. The cannon uses strong elastic bands to propel the performer, much in the same way that a slingshot fires a stone. Setting up for this stunt involves stretching the bands by 2.35 m from their unstrained length. At the point where the performer flies free of the bands, his height above the floor is the same as that of the net into which he is shot. He takes 3.02 s to travel the horizontal distance of 28.7 m between this point and the net. Ignore friction and air resistance and determine the effective spring constant of the firing mechanism. Number i Units

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