An object moves in a circle of radius R at constant speed with a period T. By what factor should the period be changed so that the object's final acceleration magnitude is k times its initial value (that is, af = ka) where k = 0.53. Tf= = T

I am currently learning about kinematics in my physics class. For one of the questions, it asks me to solve a question that asks me to find the magnitude of acceleration. I have found answers ranging between 3 and 4, but everytime I put my answer into Webassign it is wrong. I was wondering how I would find the magnitude of acceleration given the time and distance.  Thank you

A car traveling form a city "A" at 22.4 m/s skids to a stop in 2.55 s, with constant acceleration. Determine the skidding distance of the car from the starting point. Select one: a = 25.5 m.s 2 a = 15.1 m.s-2 a = 28.6 m.s 2 a = 22.6 m.s?

9: An archer fires an arrow straight up into the air with a speed v0=35.6m/s. Neglect air resistance.   a. Find the maximum height, hℎ, in meters, reached by the arrow.  b.  In terms of known quantities, write an expression for the time the arrow is in the air until it returns to launch height.

Problem 8: Tectonic plates are large segments of the Earth's crust that move slowly. Suppose that one such plate has an average speed of v= 4.4 cm/year. What distance d, in meters, does the plate move in 1.6 seconds at this speed?

A pickup truck weighing 2500 kg travels at a constant speed of 19m/s around a circular track. The diameter of the circular track is 59m. What is the magnitude of the acceleration of the truck? Please write the answer in one decimal place

A boxer's fist and glove have a mass of m = 1.04 kg. The boxer's fist can obtain a speed of v = 9.25 m/s in a time of t = 0.21 s. Write a symbolic expression for the magnitude of the average acceleration, aave, of the boxer's fist, in terms of the variables provided.  Find the magnitude of the average acceleration, aave, in meters per square second. Write an expression for the magnitude of the average net force, Fb, that the boxer must apply to his fist to achieve the given velocity. (Write the expression in terms of m, v and t.) What is the numerical value of Fb, in newtons?

Consider the following descriptions of the vertical motion of an object subject only to the acceleration due to gravity. Begin with the acceleration equation a(t) = v'(t) = g, where g= - 9.8 m/s. a. Find the velocity of the object for all relevant times. b. Find the position of the object for all relevant times. c. Find the time when the object reaches its highest point. What is the height? d. Find the time when the object strikes the ground. A softball is popped up vertically (from the ground) with a velocity of 25 m/s. а. v(t) b. s(t) = %3D c. The object's highest point is m at time t= S. (Simplify your answers. Round to two decimal places as needed.) d. t= (Simplify your answer. Round to two decimal places as needed.)

Answer all.parts

4. Assume a 5-m ladder sliding down a wall. The variable h is the height of the ladder’s top at time t, and x isthe distance from the wall to the ladder’s bottom. Assume the bottom slides away from the wall at a rate of0.8m/s. Find the velocity of the top of the latter at t = 2s if the bottom is 1.5m from the wall at t = 0s.