15-50. A boy A having a weight of 8O Ib and a girl B having a weight of 65 lb stand motionless at the ends of the toboggan, which has a weight of 20 lb. If A walks to B and stops, and both walk back together to the original position of A, determine the final position of the toboggan just after the motion stops. Neglect friction between the toboggan and the snow. A B 4 ft-

15-50. A boy A having a weight of 8O Ib and a girl B having a weight of 65 lb stand motionless at the ends of the toboggan, which has a weight of 20 lb. If A walks to B and stops, and both walk back together to the original position of A, determine the final position of the toboggan just after the motion stops. Neglect friction between the toboggan and the snow. A B 4 ft-

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter5: Further Applications Of Newton's Laws: Friction, Drag, And Elasticity

Section: Chapter Questions

Problem 9PE: Show that the acceleration of any object down an incline where friction behaves simply (that is,...

See similar textbooks

Similar questions

Check Your Understanding How does your weight at the top of a tall building compare with that on the first floor? Do you think engineers need to take into account the change in the value of g when designing structural support for a very tall building?
A person steps horizontally off the roof of a single-story house that is 3.1 m high. When his feet hit theground below, he bends his knees such that his torso decelerates over a distance of 0.65 m before coming to astop. If the mass of his torso is 50 kg, what is the average net force exerted on his torso over this distance?
13-8. What force does a 180-1b man exert on the floor of an elevator that is moving downward and decelerating at 15 ft/sec2?
To make an object start moving on a surface with friction, will it usually require more, less or the same amount of force as to keep it moving on the same surface?
Two blocks A and B of the same mass 1.06 kg are released from rest on a 30° incline when they are S = 16.4 m apart, as shown. The coefficient of friction under the upper block A is 0.21, and that under the lower block B is 0.4. Compute the elapsed time (in seconds) until the blocks touch each other.
While the aircraft weighs 5000 kg, accelerates and moves, leaving a load of 150 kg, instantaneous speed, altitude, net engine thrust, wind speed are given. Calculating the distance with the aircraft while the load falls to the ground in a negligible condition of air friction.
At the scene of an accident, two traffic experts appear to determine which of the drivers was at fault considering that it was a highway where the speed limit is 80 km / h. The data collected in the field indicate that the vehicles stuck and skidded together a length of 25 m on the pavement whose dynamic friction coefficient is μk = 0.30. Considering that the masses of vehicles A and B are 2300 kg and 1500 kg, respectively, specify which of the cars was speeding at the moment of impact and by how much it exceeded the speed limit. Express your result in km / h for the purposes of the expertise.
In a television commercial, a small, spherical bead of mass 4.00 g is released from rest at t=0in a bottle of liquid shampoo. The terminal speed is observed to be 2.00 cm/s. Find (a) the value of the constant bin the equation v=mgb(1ebt/m), and (b) the value of the resistive force when the bead reaches terminal speed.
Consider a large truck carrying a heavy load, such as steel beams. A significant hazard for the driver is that the load may slide forward, crushing the cab, if the truck stops suddenly in an accident or even in braking. Assume, for example, that a 10 000-kg load sits on the flatbed of a 20 000-kg truck moving at 12.0 m/s. Assume that the load is not tied down to the truck, but has a coefficient of friction of 0.500 with the flatbed of the truck. (a) Calculate the minimum stopping distance for which the load will not slide forward relative to the truck. (b) Is any piece of data unnecessary for the solution?
An 85 kg man tries to pull himself up the face of a boulder using a rope hooked to a tree above it. The face of the boulder created a 50.0° angle with the horizontal. If the coefficient of friction between his shoes and the boulder is 0.350, will he make it up if he pulls with 550. N of force? Remember his shoes will try to slip backwards when considering friction.
A 101 kg of ice is kicked so that it will have an initial velocity of 13 m/sec. If the coefficient of friction between the floor (horizontal) and the block of ice is 0.1, find the total distance that the block will travel in meters before coming back to rest.
A ball of mass m = 1.6 kg hangs by a thread from the roof of an elevator. Thethread can withstand only a tension force of 20 N. When the system acceleratesupwards, see Fig. 5.43, the thread breaks. Within what range is the elevatoraccelerating?