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* Two blocks of masses
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- Starting from rest, a rectangular toy block with mass 300 g slides in 1.30 s all the way across a table 1.20 m in length that Zak has tilted at an angle of 42.0 to the horizontal. a. What is the magnitude of the acceleration of the toy block? b. What is the coefficient of kinetic friction between the block and the table? c. What are the magnitude and direction of the friction force acting on the block? d. What is the speed of the block when it is at the end of the table, having slid a distance of 1.20 m?arrow_forwardThe vertical component of the acceleration of a sailplane is zero when the air pushes up against its wings with a lift force of 4.00 kN. a. Assume that the only forces on the sailplane are that due to gravity and that due to the air pushing up against its wings. What will be the gravitational force on Earth due to the sailplane? If the force acting is in upward direction, enter a positive value and if the force acting is in downward direction, enter a negative value. (answer in kN) b. If the wing stalls and the upward force decreases to 1.71 kN, what is the acceleration of the sailplane? If the acceleration is upward, enter a positive value and if the acceleration is downward, enter a negative value answer in m/s^2arrow_forwardA 15.0 kg load of bricks hangs from one end of a rope that passes over a small, frictionless pulley. A 28.0 kg counter weight is attached to the other end of the rope, as shown in the figure. You may model the rope as a massless string. The system is released from rest. A. Draw two freebody diagrams, one for the load of bricks and one for the counter weight. B. Find the magnitude of the upward acceleration of the load of bricks. 28.0 kg C. What is the tension in the rope? D. How does the tension compare to the weight of the bricks and the weight of the counter weight? 15.0 kgarrow_forward
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- A) A merry-go-round at a children's park begins at rest and is pushed by a parent while a child holds onto the ride at the outer edge, 3.10 m from the center. The parent pushes with a constant force for 2.74 s until the child is moving with a speed of 11.0 m/s. What is the magnitude of the net acceleration on the child the instant before the parent stops pushing the merry-go-round? (Give your answer to at least one decimal place.) B)The propeller of an aircraft accelerates from rest with an angular acceleration ? = 3t + 8, where ? is in rad/s2 and t is in seconds. What is the angle in radians through which the propeller rotates from t = 1.00 s to t = 6.60 s? radiansarrow_forwardAn object that weighs 45 N is on a ramp angled 27 degrees above the horizontal. What is the parallel component of gravity acting on the object? E What is the perpendicular component of gravity acting on the object? What is the normal force the ramp exerts on the object? Checkarrow_forwardTommy is working on a physics problem and asks his friend Sarah to check his work. He is to draw a free body diagram for a man walking to the left and comes up with the following: He reasons, “The man is walking to the left, so the force of friction is acting in the opposite direction. The normal force should be opposite and equal to that of the gravitational force.” Is Tommy correct with his diagram and reasoning? If so, explain. If not, what mistake did he make? Communication throughout the test will also be evaluated on 1) rounding using significant digits, 2) proper use of units, 3) organization and neatness, and 4) showing all workarrow_forward
- Ex. M₁ no friction ideal Pulley a) Find tension in each string. Please help me solve problems A and B. Thank you! b) Find acceleration of each mass. M₂ Figure 2: Two masses connected by a string Assume the string and pulley has negligible mass. There is no friction in the system.arrow_forwardThe "Giant Swing" at a county fair consists of a vertical central shaft with a number of horizontal arms attached at its upper end as shown in (Figure 1). Each arm supports a seat suspended from a 5.00-mm-long rod, the upper end of which is fastened to the arm at a point RRR = 1.80 mm from the central shaft. a)Make a free-body diagram of the seat, including the person in it. Draw the force vectors with their tails starting from the center of the dot. The location and orientation of your vectors will be graded. The exact length of your vectors will not be graded. b)Find the time of one revolution of the swing if the rod supporting the seat makes an angle of θθtheta = 32.0 ∘with the vertical.arrow_forwardDraw a diagram of the situation and label the givens in the problem: The cart's mass and the hanger's mass. Also label the direction of the cart and hanger's acceleration. Draw two force diagrams. One for the cart and one for the hanger. You can treat the track as frictionless. Remember that the force in the string will be the same throughout the entire string. Then define an x-y coordinate system and find the x and y components of the forces in your diagrams.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning