Concept explainers
A 3.0 kg body is at rest on a frictionless horizontal air track when a constant horizontal force
Figure 7-25 Problem 7.
Trending nowThis is a popular solution!
Chapter 7 Solutions
WILEY ETEXT FUND. OF PHYSICS +WEBASSIGN
Additional Science Textbook Solutions
Essential University Physics: Volume 1 (3rd Edition)
Matter and Interactions
Mathematical Methods in the Physical Sciences
College Physics
Glencoe Physics: Principles and Problems, Student Edition
University Physics Volume 1
- a block of mass m is initially at rest at the highest point of an inclined plane, which has a height of 6.8 m and has an angle of 0=16 degrees with respect to the horizontal. After it has been released, you perceived it to be moving at v=0.55 m/s a distance d after the end of the inclined plane as shown. The coefficient of kinetic friction between the block and the plane i sup=0.1 and the coefficient of friction on the horizontal surface its ur=0.2. a)what is the speed of the block, in meters per second, just after it leaves the inclined plane? b)Find the distance, d, in meters.arrow_forwardIn February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 56 m/s (terminal speed), that his mass (including gear) was 85 kg, and that the magnitude of the force on him from the snow was at the survivable limit of 1.2 *105 N.What are (a) the minimum depth of snow that would have stopped him safely and (b) the magnitude of the impulse on him from the snow?arrow_forwardblock of mass m= 5 Kg is sent sliding up a large plane inclined at 0 = 37° while a horizontal force of magnitude 50 Newton acts on it. The coefficient of kinetic friction between the block and the plane is u= 0.3, and the coefficient of static friction is us= 0.35. g 5 The blocks initial speed is 4 m/s If the block reaches a highest point, does it remain at rest or slides back down the plane?arrow_forward
- A 6.53 kg block initially at rest is pulled to the right along a horizontal surface by a constant force of 125 N applied at an angle θ above the horizontal. The coefficient of kinetic friction between the block and the horizontal surface is 0.150. At what angle θ above the horizontal surface should the force be applied to achieve the largest possible speed after the block has moved 5.00 m to the right?arrow_forwardA block of mass m is initially at rest at the highest point of an inclined plane, which has a height of 5.1 m and has an angle of θ = 16° with respect to the horizontal. After being released, it is found to be moving at v = 0.55 m/s a distance d after the end of the inclined plane as shown. The coefficient of kinetic friction between the block and the plane is μp = 0.1, and the coefficient of friction on the horizontal surface is μr = 0.2. Find the distance, d, in meters.arrow_forwardA 1.75 kg wood block is on a horizontal wood surface and a light string attached to the block passes over a frictionless pulley to a 775 g load that hangs freely (Fig. 8-10). If the 1.75 kg block is initially sliding toward the pulley, find (a) the acceleration of the block, and (b) the tension in the stringarrow_forward
- A block of mass m is initially at rest at the top of an inclined plane which has a height of 6.18m and makes an angle of θ=25.2∘ with respect to the horizontal. After being released, it is observed to be traveling at v=0.14m/s a distance d after the end of the inclined plane, as shown. The coefficient of kinetic friction between the block and the plane is μp=0.1, and the coefficient of friction on the horizontal surface is μr=0.2. Find the distance, d, in meters.arrow_forwardA uniform chain of length 8.00 m initially lies stretched out on a horizontal table. (a) Assuming the coefficient of static friction between chain and table is 0.600, show that the chain will begin to slide off the table if at least 3.00 m of it hangs over the edge of the table. (b) Determine the speed of the chain as its last link leaves the table, given that the coefficient of kinetic friction between the chain and the table is 0.400.arrow_forwardAn object with a mass of 10 kg is initially at rest at the top of a frictionless inclined plane that rises at 30° above the horizontal. At the top, the object is initially 8.0 m from the bottom of the incline, as shown in the figure. When the object is released from this position, it eventually stops at a distance d from the bottom of the inclined plane along a horizontal surface, as shown. The coefficient of kinetic friction between the horizontal surface and the object is 0.20, and air resistance is negligible. Find the distance d.arrow_forward
- At what initial speed should a box of mass m be thrown parallel to the surface of the inclined plane from the lower end of an inclined plane with friction making a 30 degree angle with the horizontal direction so that it can travel 3m on the inclined plane? (The kinetic coefficient of friction between the box and the surface of the inclined plane is mk = 0.02.)arrow_forwardWhen a click beetle is upside down on its back, it jumps upward by suddenly arching its back, transferring energy stored in a muscle to mechanical energy.This launching mechanism produces an audible click, giving the beetle its name.Videotape of a certain clickbeetle jump shows that a beetle of mass m = 4.0 * 10-6 kg moved directly upward by 0.77 mm during the launch and then to a maximum height of h= 0.30 m. During the launch, what are the average magnitudes of (a) the external force on the beetle’s back from the floor and (b) the acceleration of the beetle in terms of g?arrow_forwardA box of mass m is initially at rest at the peak of an inclined plane, which has a height of 5.5 m and has an angle of θ = 25° with respect to the horizontal. After being released, it is observed to be moving at v = 0.85 m/s a distance d after the end of the inclined plane as shown. The coefficient of kinetic friction between the box and the plane is μp = 0.1, and the coefficient of friction on the horizontal surface is μr = 0.2. a)What is the speed of the box, in meters per second, just after it leaves the inclined plane?arrow_forward
- Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning