A rectangular block is moving along a frictionless path when it encounters the circular loop as shown. The block passes points 1,2.3.4,1 before returning to the horizontal track. At point 3: A its speed is a minimum B it experiences a net upward force © the forces on it are balanced it is not accelerating

A rectangular block is moving along a frictionless path when it encounters the circular loop as shown. The block passes points 1,2.3.4,1 before returning to the horizontal track. At point 3: A its speed is a minimum B it experiences a net upward force © the forces on it are balanced it is not accelerating

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Description: ...2A rectangular block is moving along a frictionless path when it encounters the circular loop as shown. The block passes points1,2,3,4,1 before returning to the horizontal track. At point 3:A its speed is a minimumB it experiences a net upward fo

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter3: Energy And Conservation Laws

Section: Chapter Questions

Problem 4C

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I only need help with e) thank you! In the figure below, a runaway truck with failed brakes is moving downgrade at 36 m/s just before the driver steers the truck up a frictionless emergency escape ramp with an inclination of theta = 15°. The truck’s mass is 1.5 x 104 kg. (a) What minimum length L of the ramp must the ramp have if the truck is to stop at the top of the ramp at height h? (b) Does the minimum length L increase, decrease, or remain the same if the truck’s mass is decreased? Why? (c) If its speed is decreased? Why? (d) What is the velocity of the truck when its at ¾ the length of the ramp? (e) Now suppose that dirt landed on the ramp and made it into a frictional surface and the truck starts to slide down the ramp. Suppose the coefficient of kinetic friction between the ramp and the truck is (mu) sub k and the Normal force is N = mgcos(theta)/4 . From the top the truck starts to slide down the incline, find the speed of the truck when it reaches the bottom of the ramp.
Solve the problem. Indicate the GIVEN, ILLUSTRATION, and SOLUTION. A 18Kg box is pulled to the right by a 300N force that is 30 degrees above the horizontal. A constant frictional force of 175N opposes it. (a) What is the horizontal force acting on the box? (b) Calculate the acceleration. (c) What is the final speed of the box after it traveled a distance of 200m?
Review. The gravitational force exerted on a baseball is Fgj. A pitcher throws the ball with velocity vi by uniformly accelerating it along a straight horizontal line for a time interval of t = t 0 = t. (a) Starting from rest, through what distance does the hall move before its release? (b) What force does the pitcher exert on the hall?
3. Two blocks connected by a cord passing over a small, frictionless pulley rest on frictionless planes (see Figure 2). (a) Which way will the system move when the blocks are released from rest? (b) What is the acceleration of the blocks? (c) What is the tension in the cord? *
Slanted surfaces without friction: A block is given a very brief push up a 20.0° frictionless incline to give it an initial speed of 12.0 m/s.(a) How far along the surface of the plane does the block slide before coming to rest?(b) How much time does it take to return to its starting position?
Q3. A roller-coaster car, whose mass is1000 kg, starts from rest (y=40 m). Itreaches a vertical height of only 25 m onthe second hill, where it stopsmomentarily. Calculate the thermalenergy produced by friction forces andestimate the average friction force(assume it is roughly constant) on the car,if the roller-coaster car travelled a totaldistance of 400 m.
5. A mass of 10kg sits on a level surface. One end of the surface is raised until the block begins to slide down the ramp at a constant velocity and angle of 20⁰. c. What is the Normal Force, N? d. What is the Frictional Force, Ff?
A roller coaster car starts from rest at the top of a track 30.0 m long and inclined at 20.0° to the horizontal. Assume that friction can be ignored. (a) What is the acceleration of the car? (b) How much time elapses before it reaches the bottom of the track?
A cart rolls down a frictionless track and enters a half -circular section at the bottom . If the normal force acting on the cart at position A (the bottom of the half -circle ) is 5 times the cart's weight , what is the maximum height of the cart at position B ?
A 100 kg roller coaster cart travels at a constant speed in a horizontal (constant height, like a racetrack) circular loop of radius 10 meters. If it experiences a net force of 1000 Newtons, how fast is it moving? Answer in m/s.
The 125 kg rocket has an engine that generates a steady vertical force of 1720 N. A 15.5-N electrical power supply is placed on the floor inside this rocket. (a) find the rocket’sacceleration (b) As it achieves an altitude of 120 m, how hard does the floor push the powersupply?
An airplane flys in a circular loop with radius of 750m, the pilot of the airplane have a mass of 75kg. The airplane moves with a constant velocity of 100m/s. a) How much force is being put on the pilot from the seat in the top and bottom of the loop? b) What is the speed if the pilot loses contact with the seat at the top of the loop?