A) what is true about the direction of the net force and the direction of the acceleration? (B) A force is defined as “a push or a pull on an agent by an object.” What agent applies a centripetal force to an object?
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A) what is true about the direction of the net force and the direction of the acceleration?
(B) A force is defined as “a push or a pull on an agent by an object.” What agent applies a
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- A race car travels along a raceway at a constant velocity of 200km/h. What horizontal net force acts on the car?A car is driving along a circular track with diameter d = 0.59km at a constant speed of v = 21.2 m/s. Write an expression and find the value for the minimum coefficient of friction between the cars tires and road required in order to keep the car going in a circle in terms of the given parameters.A 140 kg crate is pushed at constant speed up the frictionless 33° ramp shown in the figure. What horizontal force F is required? What force is exerted by the ramp on the crate?
- A box has a mass of 31 kg. A force of 163 N is applied to it at an angle of 45º. An object moves along a surface 15 m with a coefficient of kinetic friction of 0.09 and where its initial velocity is equal to 16 meters/sec. along this path: Determine the magnitude of the friction force.A skier wishes to build a rope tow to pull herself up a ski hill that is inclined 15° with the horizontal. Calculate the tension needed in the rope to give the skier's 54 kg body an acceleration of 1.2 m/s². Ignore friction.Say that an object of mass is pushed by a system of two radial Forces and moves with a constant speed V In a circle. Which of the following relations are true about this motion? A) The acceleration of the system is zero because the speed is constant B) The object will experience a net centrifugal force that will tend to throw the mass out of the circle C) The object will experience a net centripetal force that will tend to keep the mask on the circle. D) F1-F2=mv^2/r E) Only (c) and (d) are true
- Determine the force Q-> when the block moves with constant velocity. Express your answer in vector form.An elevator in a tall building is allowed to reach a maximum speed of 3.6 m/s going down. What must the tension be in the cable to stop this elevator over a distance of 2.8 m if the elevator has a mass of 1450 kg including occupants?A woman pulls a cloth out from under a 200 g bowl sitting on a table. The bowl is 30.0 cm from the far edge of the cloth, and the cloth exerts a friction force of 0.125 N on the bowl. Assume the cloth is pulled with a constant horizontal acceleration of 2.80 m/s2. What distance (in m) does the bowl travel relative to the top of the table? (Assume the cloth moves in the +x-direction and notice that it moves more than 30.0 cm relative to the top of the table.)
- A horizontal force of 734 N is needed to overcome the force of static friction between a level floor and a 132 kg crate. What is the acceleration of the crate if the 734 N force is maintained after the crate begins to move and the coefficient of kinetic friction is 0.07?A car is traveling down a hill that makes an angle of 21° with the horizontal. The driver applies her brakes, and the wheels lock so that the car begins to skid. The coefficient of kinetic friction between the tires and the road is μK = 0.65. (a) Find the acceleration of the car. Take down the ramp to be the positive direction. (b) How long does the car take to skid to a stop if its initial speed is 32 mi/h (14.30528 m/s)?A warehouse worker pushes a box with a mass of 11.6 kg in a horizontal plane at a constant speed of 3.4 m / s. Calculate the horizontal force that the worker must apply in order to keep this motion, if the kinetic coefficient of friction between the box and the surface is µ = 0.21.