3. Two objects are connected by a light string that passes over a frictionless pulley as shown in the Figure below. Assume the incline is frictionless and take mi = 2.00 kg, m2 = 6.00 kg, and the angle of the incline to be 55.0°. (a) Draw free-body diagrams of both objects. Find (b) the magnitude of the acceleration of the objects, (c) the tension in the string, and (d) the speed of each object 2.00 s after it is released from rest. Answers: b) 3.57 m/s? c) 26.7 N d) 7.14 m/s

3. Two objects are connected by a light string that passes over a frictionless pulley as shown in the Figure below. Assume the incline is frictionless and take mi = 2.00 kg, m2 = 6.00 kg, and the angle of the incline to be 55.0°. (a) Draw free-body diagrams of both objects. Find (b) the magnitude of the acceleration of the objects, (c) the tension in the string, and (d) the speed of each object 2.00 s after it is released from rest. Answers: b) 3.57 m/s? c) 26.7 N d) 7.14 m/s

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter2: Newton's Laws

Section: Chapter Questions

Problem 19P: . Under certain conditions, the human body can safely withstand an acceleration of 10 g. (a) What...

See similar textbooks

Similar questions

A 6.0-kg object undergoes an acceleration of 2.0 m/s2. (a) What is the magnitude of the resultant force acting on it? (b) If this same force is applied to a 4.0-kg object, what acceleration is produced?
While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch. Andrea’s force is due north with a magnitude of 130.0 N and Jennifer’s force is 32 east of north with a magnitude of 180.0 N. (a) Find the net force in component form. (b) Find the magnitude and direction of the net force. (c) If Andrea and Jennifer’s housemates, David and Stephanie, disagree with the move and want to prevent its relocation, with what combined forceFDS should they push so that the couch does not move?
A body of mass 2.00 kg is pushed straight upward by a 25.0 N vertical force. What is its acceleration?
An elevator filled with passengers has a mass of 1.70103kg . (a) The elevator accelerates upward from rest at a rate of 1.20m/s2for 1.50 s. Calculate the tension in the cable supporting the elevator. (b) The elevator continues upward at constant velocity for 8.50 s. What is the tension in the cable during this time? (c) The elevator decelerates at a rate of 0.600 in/s2 for 0.600m/s2 3.00 s. What is the tension in the cable during deceleration? (d) How high has the elevator moved above its original starting point, and what is its final velocity?
A person doing a chin-up weighs 700 N, exclusive of the arms. During the first 25.0 cm of the lift, each arm exerts an upward force of 355 N on the torso. If the upward movement starts from rest, what is the persons velocity at that point?
When you take off in a jet aircraft, there is a sensation of being pushed back into the seat. Explain why you move backward in the seat—is there really a force backward on you? (The same reasoning explains whiplash injuries, in which the head is apparently thrown backward.)
A 3.00-kg block starts from rest at the top of a 30.0 incline and slides a distance of 2.00 m down the incline in 1.50 s. Find (a) the magnitude of the acceleration of the block, (b) the coefficient of kinetic friction between block and plane, (c) the friction force acting on the block, and (d) the speed of the block after it has slid 2.00 m.
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 student pulls a box of books on a smooth horizontal floor with a force of100 N in a direction of 30.0◦above the horizontal. The mass of the box and the booksis 40.0 kg. Calculate the normal force acting on the box. Calculate the distance the box of books will travel if the student pullsfor 8.0 s.
5. Two packing crates of masses m1 = 10.0 kg and m2 = 3.00 kg are connected by a light string that passes over a frictionless pulley as in the fiaure below. The 3.00-kg crate lles on a smooth incline of angle 41.0°. (Hint: Draw the two free body diagrams, determine the components the forces, Sum the x and y components to generate equations, combine equations to solve for a) m2 (a) the acceleration of the 3.00-kg crate herht of to (b) the tension in the string the fo
30. A block slides down a frictionless plane having an incli- W nation of 015.0°. The block starts from rest at the top, and the length of the incline is 2.00 m. (a) Draw a free-body diagram of the block. Find (b) the accelera- tion of the block and (c) its speed when it reaches the bottom of the incline.
3. A van is pulling a trailer along a level road, as the figure below illustrates. The mass of the truck is m1 = 7420 kg and that of the trailer is m2 = 23480 kg. The two move along the x axis with an acceleration of ax = 0.86 m/s?. Ignoring the opposing forces of friction and air resistance, (a) draw the free-body diagrams from the nevt weel tended pot to detach the modul of both the trailer and truck (b) determine the tension T in the horizontal drawbar (with negligible mass) between the trailer and the truck and (b) the force R that propels the truck forward. m2 = 23 480 kg m} = 7 420 kg ä = 0.86 m/s2. Drawbar