H.W: Two blocks connected by a cord passing over a small frictionless pulley rest on frictionless plane, as in fig. below, (a)which way will the system move? (b)w hat is the acceleration of the block (c)what is the tension in the Ans. (a) To left (b)0.65m/s (c)43.37N cord? N-100teut y N-50Neut 50.10Y 10.20 Kg 300 330

H.W: Two blocks connected by a cord passing over a small frictionless pulley rest on frictionless plane, as in fig. below, (a)which way will the system move? (b)w hat is the acceleration of the block (c)what is the tension in the Ans. (a) To left (b)0.65m/s (c)43.37N cord? N-100teut y N-50Neut 50.10Y 10.20 Kg 300 330

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 38P: A 20.O-g ball hangs from the roof of a freight car by a string. When the freight car begins to move,...

See similar textbooks

Similar questions

Consider the baby being weighed in the following figure. (a) What is the mass of the infant and basket if a scale reading of 55 N is observed? (b) What is tension T1in the cord attaching the baby to the scale? (c) What is tension T2, In the cord attaching the scale to the ceiling, If the scale has a mass of 0.500 kg? (d) Sketch the situation, indicating the system of interest used to solve each part. The masses of the cords are negligible.
A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800.0 N on him. The mass of the losing player plus equipment is 90.0 kg, and he is accelerating backward at 1.20m/s2 . (a) What is the force of friction between the losing player’s feet and the grass? (b) What force does the winning player exert on the ground to move forward if his mass plus equipment is 110.0 kg?
A 15-kg sled is pulled across a horizontal, snow-covered surface by a force appiled to a rope at 30 degrees with the horizontal. The coefficient of kinetic friction between the sled and the snow is 0.20. (a) If the force Is 33 N, what is the horizontal acceleration of the sled? (b) What must the force be in order to pull the sled at constant velocity?
On June 25, 1983, shot-putter Udo Beyer of East Germany threw the 7.26-kg shot 22.22 m, which at that time was a world record. (a) If the shot was released at a height of 2.20 m with a projection angle of 45.00, what was its initial velocity? (b) If while in Beyer’s hand the shot was accelerated uniformly over a distance of 1.20 m, what was the net force on it?
As shown below, if F=60.0Nand M=4.00kg, what is the magnitude of the acceleration of the suspended object? All surfaces are frictionless.
A body of mass m moves in a horizontal direction such that at time t its position is given by x(t)=at4+bt3+ct , where a,b ,and c are constants.(a) What is the acceleration of the body? (b) What is the time-dependent force acting on the body?
A particle of mass 2.0 kg is acted on by a single force (a) What is the particle’s acceleration? (b) If the particle starts at rests how far does it travel in the first 5.0 s?
A 20.O-g ball hangs from the roof of a freight car by a string. When the freight car begins to move, the string makes an angle of 35.0with the vertical. (a) What is the acceleration of the freight car? (b) What is the tension in the string?
Consider the 65.0-kg ice skater being pushed by two others shown below. (a) Find the direction and magnitude of Ftot . the total force exerted on her by the others, given that the magnitudes F1and F2are 26.4 N and 18.6 N, respectively. (b) What is her initial acceleration if she is initially stationary and wearing steel-bladed skates that point in the direction of Ftot ? (c) What is her acceleration assuming she is already moving in the direction of Ftot ? (Remember that friction always acts in the direction opposite that of motion or attempted motion between surfaces in contact)
Check Your Understanding A skydiver opens his parachute, and shortly thereafter, he is moving at constant velocity. (a) What forces are acting on him? (b) Which force is bigger?
A skydiver is at an altitude of 1520 m. After 10.0 seconds of free fall, he opens his parachute and finds that the air resistance, FD , is given by the formula FD=bv , where bis a constant and vis the velocity. If b=0.750 , and the mass of the skydiver is 82.0 kg, first set up differential equations for the velocity and the position, and then find: (a) the speed of the skydiver when the parachute opens, (b) the distance fallen before the parachute opens, (c) the terminal velocity after the parachute opens (find the limiting velocity), and (d) the time the skydiver is in the air after the parachute opens.
A student is attempting to move a 30-kg mini-fridge into her dorm room. During a moment of Inattention, the mini-fridge slides down a 35 degree incline at constant speed when she applies a force of 25 N acting up and parallel to the Incline. What is the coefficient of kinetic friction between the fridge and the surface of the incline?