In this question, the acceleration has two components Problem 2. 1989-Spring-CM-U-2.A platform is free to rotate in the horizontal plane about a frictionless, vertical axle. Aboutthis axle the platform has a moment of inertia Ip. An object is placed on a platform adistance R from the center of the axle. The mass of the object is m and it is very small insize. The coefficient of friction between the object and the platform is µ. If at t = 0 a torqueof constant magnitude Ã about the axle is applied to the platform when will the object startto slip?

Answered: A platform is free to rotate in the…

Similar questions

A roller coastre car rapidly picks up speed as it roles down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is the average acceleration?
A ball falls from height of 12 meters. Each time that the ball hits the ground the ball bounces of original height. Calculate the full distance run by the ball if it stops after six 6 bounces. ○ 50 m 96 m о о 48 m ○ 84 m
A particle moves along the x-axis according to x(t) = 42t – 6t2 m. (Round all answers to at least the nearest integer.) (a) What is the instantaneous velocity (in m/s) at t = 2 s and t = 5 s? (Indicate the direction with the sign of your answer.) v(2 s) = m/s v(5 s) = m/s (b) What is the instantaneous speed (in m/s) at these times? s(2 s) m/s s(5 s) m/s (c) What is the average velocity (in m/s) between t = 2 s and t = 5 s? (Indicate the direction with the sign of your answer.) m/s
A person stands on a cliff edge and throws a stone vertically upwards at time t = 0. The stone leaves their hand at 20 m/s. Take the acceleration due to gravity as 9.8 m/s Show that the equation for the displacement of the stone is: s = 20t − 4.9t^2
An object is dropped from rest and falls 180m during 15s of free fall. Did this occur on the moon (g=1.6m/s/s), earth (g=9.8m/s/s), or Jupiter(g=26.0m/s/s)?
A basketball player jumps straight up to grab a rebound. If she’s in the air for 0.80 seconds, how high did she jump? (Hint: Treat this as a problem where the player comes down from the peak of her )
An object initially at rest has a constant acceleration. Which is true? Distance after 2 seconds is four times distance after 1 second. Distance after 2 seconds is eight times distance after 1 second. O Speed after 2 seconds eight times speed after 1 second. Distance after 2 seconds is twice distance after 1 second. O Speed after 2 seconds is four times speed after 1 second.
The instantaneous acceleration at time t = 1 s is m/s2.The instantaneous acceleration at time t = 3 s is m/s2.The instantaneous acceleration at time t = 5 s is m/s2.
8
A hot-air balloon is ascending at the rate of 13 m/s and is 87 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?
6. A ball is thrown upward with a velocity of 4.5 m/s. Its speed and the magnitude of its acceleration at the highest point (a) are both equal to zero (b) are given by 9.81 m/s and 0 m/s², respectively (c) are given by 0 m/s and 9.81 m/s², respectively (d) cannot be predicted unless the height is known Answer: 7. Which of the following statements about a projectile is not true? Assume that the air resistance is negligible. (a) Its motion is in two dimensions. (b) The only acceleration is in the vertical direction. (c) Its velocity in the horizontal direction remains the same throughout the flight. (d) The velocity at the highest point of its trajectory is zero. Answer:
tesponse A ball of mass 5 kg is thrown horizontally from top of a 30 m cliff as shown. It takes 4 seconds to reach the ground a distance of 100 m from the bottom of the cliff. What is the x components of the initial velocity? 30 m 100 m 25 m/s O 20 m/s O 35 m/s O 10 m/s A O 10) O O O

SEE MORE QUESTIONS