A horizontal force of 300 N is exerted on a 1.5-kgball as it rotates (at arm's length) uniformly in a horizontal circle of radius 0.90 m. Calculate the speed of the ball. Express your answer to two significant figures and include the appropriate units. V= ____________ _____________

A circus motorcycle acrobat is trying to calculate the speed required to perform a loop- the-loop with a motorcycle. The loop has a radius of 10 m. At what speed must the motorcycle enter the loop at the bottom to negotiate a complete loop against gravity, without the use of its engine while in the loop? We do not have enough information. Mass is required. b) More than 20 m/s. c) More than 25 m/s. Exactly 20 m/s. Exactly 25 m/s.

problem 4

Question 1 (3 points) Listen A 2.00kg mass is swung on the end of a rope that is 1.20m long at a speed of 3.00m/s. What is the centripetal force the rope exerts on the mass? 7.50N 18.0N 15.0N 5.00N Question 2 (2 points) Listen A man pulls a cement block with a force of 450N using a rope that makes an angle of 35.00 above the horizontal. What is the x-component of his pulling force ? 258N

A cellphone steps into a “Graviton” and stands up against the frictionalwall. The Gravitron starts to spin and the floor lowers below the cellphone butthe cellphone does not accelerate downwards, she has no net force vertically. Assume:● The radius of the Gravitron is 7.5 m● The cellphone has a tangential velocityof 15 m/s● The man has mass M Determine: Determine the minimum coe cient of static friction between the wall and the cellphone.

Question 3 please show work

The figure below shows a car traveling in a counterclockwise along a circular path.  If the radius of curvature of the road is 87 m and the speed of the car is 13 m/s, determine the centripetal acceleration of the car.

76-78 please

What is the answer ?

See attachment