. A mass of 10kg sits on a level surface. One end of the surface is raised until the block begins to slide down the ramp at a constant velocity and angle of 20⁰. a. What is the coefficient of friction between the block and the incline plane? b. What is the weight of the Block,w?

13. 54-kg box is sitting on the floor of a level railroad car which is moving forward with a speed of 25 m/s and accelerating at a rate of 5.6 m/s2. What is the strength, in Newtons, of the frictional force acting on the box if it does not slide on the floor? O A. 0 O B. 25 N O C. 54 N O D. 248 N O E. 255 N O F. 302 N O G. 520N O H. 1350 N Back Save & Continue 2020 BYU 99+

2. A 1,480-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. The floor has some amount of friction. 20.0° a a. Draw a free body diagram of all the forces on the crate. b. Write out one equation for the y component of the resultant force. Hint: The crate does not move in the y direction. Write out one equation for the x component of the resultant force. Hint: the crate moves in the x direction. C. d. Determine the Normal force. e. What is the coefficient of kinetic friction between the crate and the floor? (Enter vour answer to at least three decimal places.)

plz use g=9.8

3. a. You put this large blow up Halloween decoration in your yard. The wind is blowing it to the left with 232.5 N. It stays put becuase it's supported by the rope. 0 = 58 degrees. The mass of the pumpkin is 9.55 kg. What is the tension in the rope? Previous submissions: T 615.38 b. What is FN of the ground pushing up on the pumpkin? Previous submissions: N

1. A car of mass 1000.0 kg is stationary on a slope forming an angle = 20° with the horizontal line. The car is located at a distance of 50 m from the foot of the slope. The coefficient of static friction between the tires and the road is μ = 0.20. a. Draw a free-body-diagram of the problem including all the information that is provided. b. Will the car slide down the slope? Motivate your answer to obtain any points. Once the car starts sliding down the slope, the coefficient of dynamic friction becomes μ = 0.15. c. Calculate the acceleration of the car. d. Calculate the velocity of the car at the foot of the slope. e. Calculate the kinetic energy of the car at the beginning and at the end of the motion. f. Calculate the total work done on the car. g. Calculate the gravitational potential energy of the car at the beginning and at the end of the motion. h. Calculate the work done on the car by the gravitational force. i. Calculate the work done on the car by the frictional force.

A heavy steel cable attached to a motor is lifting a girder. The girder is speeding up. A. Draw a free-body diagram for the steel cable. B. Draw a free-body diagram for the girder.

A very large cat sits at the center of a swing. Two scales are attached to the ropes. One scale reads 5 kg.A. What does the second scale read?B. What is the combined weight of the cat and swing?

Part D B5.4 Part E B5.5 Part F В5.6 A 200 m bridge span is supported at both ends. The span weighs 100 tonnes. A 30 tonne bus is 50 m from one end of the span. Calculate the supporting force holding the bridge up at the end nearer the bus. Please give your answer to 2 significant figures. Value Units 7 Check my answer Part G B5.7

The drag on a pitched baseball can be surprisingly large. Suppose a 145 g baseball with a diameter of 7.4 cm has an initial speed of 40.2 m/s (90 mph).a. What is the magnitude of the ball’s acceleration due to the drag force?b. If the ball had this same acceleration during its entire 18.4 m trajectory, what would its final speed be?