A 355 kg box is pulled 7.00 m up a 30°3 frictionless, inclined plane by an external force of 4775 N that acts parallel to the plane. Calculate the work done by the external force. Calculate the work done by gravity. Calculate the work done by the normal force.
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A 355 kg box is pulled 7.00 m up a 30°3 frictionless, inclined plane by an external force of 4775 N that acts parallel to the plane.
Calculate the work done by the external force.
Calculate the work done by gravity.
Calculate the work done by the normal force.
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- A 5.40-kg box rests on a horizontal surface. The coefficient of kinetic friction between the box and surface is µk 0.410. A horizontal force pulls the box at constant velocity for 23.0 cm. Find the work done by the applied horizontal force. Submit Answer Tries 0/10 Find the work done the frictional force. Submit Answer Tries 0/10 Find the work done by the net force. Submit Answer Tries 0/104. A constant force of 20.0 N i pushes a 1.50 kg mass over a distance of 5.00 m. in the x-direction. (a) What is the work done by the force? (b) If this is the only force doing work, what is the final speed of the mass? (c) If there is friction in the system and the final speed of the mass is actually 11.0 m/s, what must the coefficient of kinetic friction be? Answers: (a) 100 J, (b) 11.5 m/s, (c) 0.629A 54-kg box is being pushed a distance of 7.2 m across the floor by a force whose magnitude is 167 N. The force is parallel to the displacement of the box. The coefficient of kinetic friction is 0.20. Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work done by each force.
- In the figure, a constant external force P = 300 N is applied to a 20.0 kg box, which is on a rough horizontal surface. While the force pushes the box a distance of 8.00 m, the speed changes from 0.500 m/s to 2.60 m/s. The work done by friction during this process is closest to P 30° 20 kg -8.0 m O A. +2209 J ОВ.-1948 J OC.-2013 J O D.+1948 J O E. +2013 J11. A person pushes a m = 2.60 kg carton a distance d = 4.20 m along the floor by a constant force of magnitude F = 16.0 N directed at an angle 0 = 30.0° below the horizontal as shown in the figure. Assume the floor is frictionless. (a) Determine the work done on the carton by the applied force (the force on the carton exerted by the person). (b) Determine the work done on the carton by the normal force exerted by the floor. (c)Determine the work done on the carton by the gravitational force. (d)Determine the work done by the net force on the carton. mA car is parked on a hill. The gravitational force on the car is 9.31 x 103 N straight downward, and the angle of the hill is 4° from the horizontal. The car’s brakes fail, and the car slides 30.0 m downhill. a) Calculate the component of the gravitational force that acts parallel to the car’s motion. b) Calculate the work done on the car by gravity as the car slides.
- I need help with part D!!2. A cart is pulled a distance D on a flat, horizontal surface by a constant force F that actsat an angle θ with the horizontal direction. The other forces on the object during thistime are gravity (Fw), normal forces (FN1) and (FN2), and rolling frictions Fr1 and Fr2,as shown below. What is the work done by each force?1. A 5kg block is push up a rough, inclined surface by a constant force of 20N. The surface is inclined at an angle of 15° and the force is applied completely horizontally and parallel to the ground below the incline. (Not parallel to the inclined surface). As a result, the velocity of the block increases from 0 m/s to 4 m/s in a displacement of 10m. A)What work was done by the frictional force during this displacement? B)What would have been the final velocity if friction was not present? C) Why was the final kinetic energy without friction higher than the total kinetic energy with friction?
- 14. A coin slides over a frictionless plane and across an y coordinate system from the origin to a point with ry coordinates (3.0 m, 4.0 m) while a constant force acts on it. The force has magnitude 2.0N and is directed at a counterclockwise angle of 100 from the positive direction of the r axis. How much work is done by the force on the coin during the displacement?A 2,200-kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 4.60 m before coming into contact with the top of the beam, and it drives the beam 15.0 cm farther into the ground as it comes to rest. Using energy considerations, calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest. 588925.42 magnitude Write an expression for the work done by all of the forces acting on the beam as it moves into the ground and relate that work to the change in energy of the pile driver in order to find the force that the beam exerts on the pile driver. N9. A man pushes an 80-N crate up a frictionless slope that makes an angle of 30° with the horizontal. The man was able to push it to a distance of 5.0Om along the slope with a force parallel also to the slope. However the speed of the crate decreases at a rate of 1.5 m/s?. The work being done by the man is: A. -200 J В. 61J С. 140 J D. 200 J 14. A 6.0-kg block is released from rest 80 m above the ground. When it has fallen 60 m its kinetic energy is approximately: A. 4800 J В. 3500J C. 1200 J D. 120 J