A car travels with a constant speed around a curve in the road. The curve is banked. Which of the following forces is in the direction of the net force on the car? O A) the x-component of the force of gravity B) the frictional force C) the x-component of the normal force D) the force of gravity
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- The game of tetherball involves a ball tied to a rope the other end of which is tied to the top of a pole. Players try to hit the ball around the pole in opposite directions until it is completely wrapped around the pole. What forces make the ball move in a circle around the pole? a) The tension in the rope accelerates the ball in the direction of its motion b) Gravity and the tension in the rope combine to make a horizontal force toward the pole c) Gravity pulls the ball down and the tension in the rope pulls the ball toward the poleA 1000-N car is proceeding on a roller coaster ride. The car enters a vertical loop of radius-30-meters. The speed of the car as it enters the loop is 50 m/s. The car slows owing to gravity and the speed at the top of the loop is 36 m/s. a) Determine the normal force acting on the car at the bottom of the loop. b) Determine the normal force acting on the car at the top of the loop. c) What speed must the car be traveling at the top of the loop for the passenger to appear weightless.Right before a shoe starts sliding down an iclined ramp, θ reaches a maximum which means the force of gravity down the ramp is also at a maximum. This force is balanced by the static friction acting up the ramp. By reducing the angle of the ramp by a factor of 2 ?? does not change, yet the object remains stationary. As the angle of the ramp decreases, the normal force increases. Explain why the object remains stationary.
- A cyclist (mass 93.0 kg) traveling with speed 8.20 m/s, attempts to make a right hand turn at an level intersection. The coefficient of friction between the tires and the road is μ = 0.310. What is the smallest radius of circular path that the cyclist can travel without slipping? a)6.79 m b)13.8 m c)22.1 m d)17.7 m e)34.2 mPart A) Determine the speed of the truck in 20 s, starting from rest. Express your answer to three significant figures and include the appropriate units Part B) Determine the tension developed in the coupling between the SUV and the trailer. Neglect the mass of the wheels. Express your answer to three significant figures and include the appropriate units.Q5
- Car A uses tires for which the coefficient of static friction is 0.281 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 11.0 m/s. Car B uses tires for which the coefficient of static friction is 0.812 on the same curve. What is the maximum speed at which car B can negotiate the curve?A 2 m long massless rod supports a 12 N weight. The left end of each rod is held in place by a frictionless pin. In each case, a vertical force F is holding the rods and the weights at rest. Rank the magnitude of the vertical force F applied to the rods. Example A B If two cases are equal they can go in either order.1. A racing bicycle with rider has a combined mass of 85 kg. The racer is on a velodrome (circular racing track) that has banked curves. The surface is banked at an angle of 35° from horizontal. The track has a radius of 60 m. a) Draw a free-body diagram of the racer viewing the racecar from the front (left) and from above (right.) Ignore friction. Indicate the direction of the acceleration of the racer next to your diagram. b) Based on your free-body diagram do you think the car could possibly stay on a circular path (the track) without friction? Explain. c) Which of the forces you drew has a component in the same direction as the acceleration? Explain. d) Write down your force equations and solve for the acceleration of the racer moving at a constant speed around the track with no friction. (Hint: Use the direction of the acceleration as one of your axes. Do not use along-the-incline and perpendicular-to- the-incline as your axes.) e) What speed would the racer have with this…
- A car is rounding a turn on a road that is banked at some angle with respect to the horizontal. The road is covered with ice and there is no friction between the road and the tires. which of the following forces is responsible for keeping the car on its circular path? The horizontal component of the force of gravity It is impossible for the car to stay on a circular path in this situation The vertical component of the force of gravity The horizontal component of the normal force The vertical component of the normal force Complete the following sentence. Centripetal forces enable objects to follow circular trajectories with constant speed. enable objects to follow circular trajectories with constant acceleration. O are described by Hooke's law for springs. double in magnitude when an object's speed in uniform circular motion is doubled. OOOO3. One end of a string is attached to a vertical pole with the other end of the string attached to a ball that swings in a horizontal circular path, as shown. Draw a free body diagram to represent the forces exerted on the ball.Learning Goal: A 1290 -kg car is pushing an out-of-gear 2200 -kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push horizontally against the ground with a force of 4580 N. The rolling friction of the car can be neglected, but the heavier truck has a rolling friction of 755 N, including the "friction" of turning the truck's drivetrain. What is the magnitude of the force the car applies to the truck?