Related questions
Question
Transcribed Image Text:3. An accelerating sprinter pushes off with 560 N force. This force is applied on the ground
horizontally. The net downward force on the ground is three times the weight for this
70 kg sprinter.
A.Identify all the forces on the foot of the person and draw an accurate
and complete free body diagram.
O. Write down the correct equations of motion ON THE FOOT by
summing all the forces along each axis acting on it using Newton's 2nd Law of
Motion. You must identify and draw your chosen coordinate system.
C- Solve for the minimum coefficient of friction needed to prevent
slipping.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 2 steps with 1 images
Knowledge Booster
Similar questions
- which of the following is true about support force. Choose all that apply. A. An object is in free fall. Support force equals to the weight of the free falling object. B. A 2 lbs book is at rest on the table.A . Support force of 2lbs acts on the book. C. when astronauts are in orbit there is no support force acts on the astronauts. D. when you are standing still on a bathroom scale, support force is equal to your weight.arrow_forward2. 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.)arrow_forwardA large massive rock is in contact with the Earth. Draw a force diagram for the rock and the Earth. Which of the following statements is true? A. The contact force on the Earth due to the rock and the gravitational force on the Earth due to the rock are interaction partners. B. The gravitational force on the rock due to the Earth and the gravitational force on the Earth due to the rock y are interaction partners. C. The gravitational force on the Earth due to the rock and the contact force on the Earth due to the rock are interaction partners. D. The gravitational force on the rock due to the Earth and the contact force on the Earth due to the rock are interaction partners.arrow_forward
- A homogeneous pulley with two grooves consists of two wheels which turn together as one around the same axis. The moment of inertia of the two wheels together is ICM = 40 kg m2. The radii are: R1 = 1.2 m and R2 = 0.4 m. The masses that hang on both sides of the pulley are m1 = 36 kg and m2 = 12 kg. We will assume that the masses of the ropes are negligible. Determine the angular acceleration of the pulley, acceleration of the masses, and the tensions of the ropes.arrow_forward1. A 1500 kg vehicle accelerates from rest at 2.5 m/s?. If the engine generates a 4200 N Applied force, a. Calculate the Net Force acting on the car b. Calculate the Force of friction acting on the vehiclearrow_forwardA box with mass 13.0 kg moves on a ramp that is inclined at an angle of 55.0∘ above the horizontal. The coefficient of kinetic friction between the box and the ramp surface is μk = 0.300. a. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 150.0 N that is parallel to the ramp surface and directed down the ramp, moving the box down the ramp. b. Calculate the magnitude of the acceleration of the box if you push on the box with a constant force 150.0 N that is parallel to the ramp surface and directed up the ramp, moving the box up the ramp.arrow_forward
- You need to push a couch 4 m to the other side of the room. After the initial push to get it going you push on the 90kg couch with a steady horizontal force of 600 N. The coefficient of kinetic friction between the couch and the floor is 0.6. 1. What is the magnitude and direction of the frictional force on the couch? 2. What is the magnitude and direction of the net force on the couch? 3. What is the magnitude and direction of the acceleration of the couch?arrow_forwardA car weighing 7450 N is driving on a flat horizontal road at 24.6 m/s (55.0 mph) when it slams on its brakes and skids to a stop over a distance of 32.5 meters. a. Find the mass of the car. b. Find the magnitude of the average acceleration of the car during the skid. c. Find the magnitude of the average net force acting on the car during the skid. d. Find the coefficient of kinetic friction between the car’s tires and the road.arrow_forward2. An object of mass M-40 kg is pushed up an inclined plane with an acceleration of 0.5 m/s by a force T. The force T is parallel to the horizontal. The inclined plane forms an angle of 0-37 with the horizontal. The coefficient of kinetic friction of an object with an inclined plane is 0.20. a. Draw a free-body diagram of the forces acting on the block as it is pushed up an inclined plane. b. Determine the magnitude of the force T.arrow_forward
- A man pushes a 92 kg crate with 272 N of force.. The crate experiences a force of friction of 25 N. a. What is the weight of the crate? b. What is the normal force? c. What is the net force acting on the crate? d. What is the acceleration of the crate?arrow_forward4. Block A in the figure has a mass of 4.00 kg and block C has a mass of 13.9 kg. The coefficient of kinetic friction between block B and the horizontal surface is 0.287. a. What is the mass of block B if block B is moving to the right and speeding up at a rate of 1.45 m/s²? b. What is the tension in each cord when block B has this acceleration? A Barrow_forwardA remote controlled car drives up my street. The car weighs eight pounds. a. The cars motor creates a force of traction of six pounds, pushing the car forward. What acceleration does this provide to the car? b. Starting from rest how long will it take for the car to travel twenty meters? How fast will it be going? c. Draw a free body diagram of the car.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios