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- A 2.00-kg block is at rest on a horizontal plank that is 1.50 m long. When one end of the plane is raised to 0.50 m, the block starts sliding down. What is the coefficient of static/starting friction between the block and the plank? O 0.43 O 0.35 0.33 O 0.53A push of magnitude P acts on a box of weight W as shown in the figure. The push is directed at an angle 0 below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box. The normal force on the box due to the floor is equal to: O W + P cos 0. O W + P sin 0. OW-P sin 0. O W + P. O W. W 0 P9. In a game of shuffleboard (played on a horizontal surface), a puck is given an initial speed of 6.0 m/s. It slides a distance of 9.0 m before coming to rest. What is the coefficient of kinetic friction between the puck and the surface? 0.20 b. 0,18 a. C. 0.15 d. 0.13 0.27 e. a お hp
- A car is moving in a circular road ( radius of 55.4 m) with a speed of 10.8 m/s. Find the minimum static friction coefficient between the wheels of the car and the road to keep the car moving without sliding. Select one: OA. 0.320 OB. 0.253 OC. 0.278 OD. 0.305 OE 0.215 Next pageA 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are us 0.40 and uk = 0.30, respectively. The puck's initial speed is 4.9 m/s. What speed does it have when it slides back down to its starting point? 2.8 m/s 4.9 m/s 4.2 m/s 3.5 m/sA car is moving in a circular road ( radius of 56.1 m) with a speed of 12.3 m/s. Find the minimum static friction coefficient between the wheels of the car and the road to keep the car moving without sliding. Select one: O A. 0.275 B. 0.410 O C. 0.324 O D. 0.391 O E. 0.356
- A block slides down a rough 30°-incline with an acceleration of 2 m/s?. The coefficient of kinetic friction u, between the block and the surface of the incline is: A. 0.34 B. 0.17 C. 0.22 D. 0.28 E. 0.8116:39 p E p • X Assignment 2_Vectors, Kinem... •.. D. d 32. An upward force applied to lift a mass of m kg causes it to accelerate upwards at a m/s?. The tension, T, in the cable, measured in newtons, is A. m.g Tams B. m.a C. m.a+ m.g D. m.g - m.a 33. If you're standing on the Moon holding a pen, and you let go, the pen will A. float away B. float where it is C. fall towards the Earth D. fall to the surface of the Moon 34. A car, starting from rest, accelerates in a straight-line path at a constant rate of 2.5 m/s. How far will the car travel in 12 seconds? A. 180 m B. 30 m C. 4.8 m D. 120 m 35. The resultant of all the forces acting on a body is zero if the body is A. accelerating B. falling freely from rest C. moving in a circular path D. moving with constant velocity 36. Newton's third law of motion involves: A. one force acting on one object. B. a force pair acting on two different objects. C. a force pair acting on one object. D. unbalanced forces acting on many objects. 37.…40 kg Ms = 0.4. 50 kg P 30 kg Hs = 0.3- 30° shown in the figure. Determine the smallest force P which will cause sliding. Hs = 0.45 A 40 kg block is attached to the wall with a wire and is resting on the 50 kg and 30 kg blocks on an inclined surface. The coefficients of friction for each contact between the blocks and the surface are
- 5. The 2.0 kg block in the figure slides down a frictionless curved ramp, starting from rest at a height of h = 4.00 m. The block then slides d = 7.60 m on a rough horizontal surface before coming to rest. What is the coefficient of friction between the block and the horizontal surface? O ssf60 ssf60 sso m = 2 kg 0 ss 60 ss(60 ssf60 o SsT60 ssf60 ssf60 ssf60 ss ssf60 ssf60 ssf60 sf60The figure shows a 1.0 kg block being pulled to the right by a 7.0 N force. The block is not moving. The coefficients of static and kinetic friction are 1.0 and 0.5, respectively. How big is the friction force acting on the block? OOO ΟΝ 4.9 N 7.0 N 9.8 N 1 kg μs = 1 μk = 0.5 Mk Some other value 7.0 NIn the figure m = 2.0 kg. F = 10.0 N, and the coefficient of kinetic friction between the block and the surface is 0.20. What is the friction force between the block and the surface? F 30° O 3.9 N O 2.9 N 1.9 N O 4.9 N