on a highway curve with radius 42 m, the maximum force of static friction (centripetal force) that can act on a 1,123 kg car going around the curve is 8,127 N.  A. what is the magnitude and direction of child's acceleration? B. what is the acceleration in g's  C. what speed limit should be posted for the curve so that cars can negotiate it safely

13. A 2.50 kg ball is swung on a string in such a way that is moves in a horizontal circle at constant speed. The string is .750 m long and makes an angle of 37° to the vertical. a. What is the tension in the string? b. How fast does the ball move? l=,75m

Under good conditions, a car can travel at a maximum speed of vmax around a particular unbanked curve.  In the aftermath of an ice storm, however, driving at that same speed will cause the car to slide off the road.  Which of the statements below best describes why this is true?   a. The friction force is no longer strong enough to balance the centripetal force and give the car zero acceleration.   b. The friction force is needed to do negative work on the car to reduce the car’s kinetic energy.   c. The friction force no longer provides a strong enough unbalanced force to change the car’s velocity quickly enough to stay on the curve.   d. The car “floats” on the ice reducing the gravitational force which is what keeps the car on the road.   e. [All of the above.]

A ball on a string moves around a complete circle, once a second, on a frictionless, horizontal table. The tension in the string is measured to be 6.0 N. What would the tension be if the ball went around in only half a second? A. 1.5 N B. 3.0 N C. 12 N D. 24 N

2) A roller coaster is going over a hill with a radius of 20 m.     a. How fast does it have to go for the passengers to feel weightless at the top? b. Suppose the roller coaster was running on the Moon, where the acceleration of gravity is only 1.7 m/s^2. How fast would it need to travel for you to feel weightless there?

A stuntman drives a car (without negative lift) over the top of a hill, the cross section of which can be approximated by a circle of radius R= 250 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill in km/h? R Lütfen birini seçin: O A. 178 O B. 221 O C. 135 O D. 150 O E. 205

Pls help ASAP.

Two balls, X and Y, are spun at a velocity of 6.5 m/s in a horizontal circle on the path shown below. Ball X has a mass of 1.3 kg, and ball Y has a mass of 0.81 kg. Which statement best describes the centripetal acceleration and centripetal forces on the balls? A. Both balls will experience equal centripetal force and centripetal acceleration. B. Ball X will experience greater centripetal force and greater centripetal acceleration. C. Ball Y will experience greater centripetal force, but ball X will experience greater centripetal acceleration. D. Both balls will experience the same centripetal acceleration, but ball X will experience greater centripetal force.

Q. 1 a. An object is revolving in a vertical circle. Draw a free-body diagram and apply the dynamics of circular motion to write equations at i. at the top of the circle ii. at the bottom of the circle b. The ball is swung in the horizontal direction. What force must a person exert on a string attached to the 0.5 kg ball to make it revolve in a horizontal circle of radius 3.0 m. The ball makes 120 rpm. c. The 0.5 kg ball is swung in a vertical direction on the end of s 3.0 m long cord of negligible mass. i. what is the minimum speed at the top of the circle so that the ball continues to move in a circle, and ii. what is the tension in the string if the speed at the bottom is triple the speed at the top.

You go through a loop in a roller coaster at constant speed. Your acceleration is: A. zero B. straight down C. toward the center D. straight up