Angular acceleration of a cylinder

A massless string is wrapped around a uniform solid cylinder with mass M = 10 kg and radius R = 0.40 m. One end of the string is attached to the cylinder and the free end is pulled tangentially by a force that maintains a constant tension T = 5 N . Find (a) the angular acceleration (b) the angular speed of the cylinder 5 ...continues

Application of Newtons Laws

a.) A wedge with mass M rests on a frictionless horizontal tabletop. A block with mass m is placed on the wedge. There is no friction between the block and the wedge. The system is released from rest. Calculate: i) the acceleration of the wedge ii) the horizontal and vertical components of the acceleration of the block. (Do thes ...continues

Force word problem

The largest caliber aircraft gun operated by German Air Force in WW2 was the 12.8cm flak 40. The weapon fired a 25.8kg shell with a muzzle speed of 880m/s. What propulsive force was necessary to attain the muzzle speed within the 6.00m barrel.(assume the shell moves horizontally w/consistant acceleration and neglect friction) ...continues

Force word problem

The gravitational force on a baseball is -Fgj(with a ^ over the j) A pitcher throws the baseball with velocity vi (with a ^ over the i) by uniformly accerating it straight forward horizontally for a time interval change of t = t-0 =t. If the ball starts from rest, through what distance does it accelerate before its release and ...continues

Circular Motion and Gravitation

A bead can slide without friction on a circular hoop with a radius of .100 m in a vertical plane. The hoop rotates at a constant rate of 3.00 rev/s about a vertical diameter. a) find the angle θ at which the bead is a vertical equilibrium. b) is it possible for the bead to "ride" at the same elevation as the center o ...continues

Basic question

A force F applied to an object of mass m1 produces an acceleration of 3.00m/s^2 the same force applied to a second object of mass m2 produces an acceleration of 1.00m/s^2 (a)What is the value od m1/m2?.........I understand that a2/a1=1/3 --answer (b)if m1 and m2 were combined find their acceleration under the action of th ...continues

Determining Center of Mass

Find the center of mass of a system of three particles of mass 2 kg, 3kg and 4 kg placed at the corners of an equilateral triangle of side 2 meters.

Average acceleration

Hi. Here's my problem: "A tennis ball with a speed of 11.8 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 8.51 m/s. If the ball is in contact with the wall for 0.00175 s, what is the average acceleration of the ball while it is in contact with the ...continues

uniform acceleration

"A car accelerates from rest and travels for 4.98 s with a uniform acceleration of +1.50 m/s^2. The driver then applies the brakes, causing a uniform acceleration of -1.99 m/s^2. If the brakes are applied for 3.06 s, how fast is the car going at the end of the braking period? And how far has the car gone?"

constant acceleration/maximum height

"A model rocket is launched straight upward from the ground with an initial speed of 53.3 m/s. It rises with a constant upward acceleration of 1.86 m/s^2 until its engines stop at an altitude of 161 m. What is the maximum height reached by the rocket?" I'm not sure how to proceed with this problem. Here's what I know (I think ...continues