Block 1 (3 kg) is resting on the surface of a tab 18 N. On a sheet of paper, draw the free body diagram for block 1 using the two-subscript notation from class. After completing the free body diagram, enter below each force and its x & y-components. Remember that the x-component is the "i" component and the y-component is the "j" component. (use g = 10 m/s²) %3D

Block 1 (3 kg) is resting on the surface of a tab 18 N. On a sheet of paper, draw the free body diagram for block 1 using the two-subscript notation from class. After completing the free body diagram, enter below each force and its x & y-components. Remember that the x-component is the "i" component and the y-component is the "j" component. (use g = 10 m/s²) %3D

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter4: Dynamics: Force And Newton's Laws Of Motion

Section: Chapter Questions

Problem 34PE: Figure 4.39 shows Superhero and Trusty Sidekick hanging motionless from a rope. Superhero's mass is...

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Figure 4.39 shows Superhero and Trusty Sidekick hanging motionless from a rope. Superhero's mass is 90.0 kg, while Trusty Sidekick's is 55.0 kg, and the mass of the rope is negligible. (a) Draw a free-body diagram of the situation showing all forces acting on Superhero, Trusty Sidekick, and the rope. (b) Find the tension in the rope above Superhero. (c) Find the tension in the rope between Superhero and Trusty Sidekick. Indicate on your free-body diagram the system of interest used to solve each part. Figure 4.39 Superhero and Trusty Sidekick hang motionless on a rope as they try to figure out what to do next. Will the tension be the same everywhere in the rope?
A block of mass m1= 10 kg is on a frictionless table to the left of a second block of mass m2 = 24 kg, attached by a horizontal string (Figure WU4.13). If a horizontal force of 120 N is exerted on the block m2in the positive x-direction, (a) use the system approach to find the acceleration of the two blocks. (b) What is the tension in the string connecting the blocks? (See Section 4.6.) Figure WU4.13
Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second exerts a force of 90.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 23.0 kg. (a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (See the free-body diagram.) (b) Calculate the acceleration. (c) What would the acceleration be if friction were 15.0 N?
Consider the figure below, where M 2 = 4.0 kg is stacked on top of M 1 = 12.0 kg, which is accelerating along ahorizontal, icy, frictionless surface at a = 5.0 m/s 2 . (a) What’s the minimum static coefficient of friction between the blocks that will prevent M 2 from sliding off? Draw a free-body diagram for each block (b) What’s the force acting on the bottom block given the condition in (a)?(c) If the coefficient of kinetic friction is half the amount you solved in (a) find the acceleration of block M 2 , where the acceleration of the bottom block remains the same.(d) What’s the force acting on the bottom block given the condition in (c)?
The human head can be considered as a3.3-kg cranium protecting a 1.5-kg brain, with a small amount ofcerebrospinal fluid that allows the brain to move a little bit insidethe cranium. Suppose a cranium at rest is subjected to a force of2800 N for 6.5 ms in the forward direction. (a) What is the finalspeed of the cranium? (b) The back of the cranium then collideswith the back of the brain, which is still at rest, and the two movetogether. What is their final speed? (c) The cranium now hits anexternal object and suddenly comes to rest, but the brain continues to move forward. If the front of the brain interacts with thefront of the cranium over a period of 15 ms before coming to rest,what average force is exerted on the brain by the cranium?
Block A in (Figure 1) weighs 68.0 N. The coefficient of static friction between the block and the surface on which it rests is 0.260. The weight w is 9.00 N and the system remains at rest. Find the friction force exerted on block A. f = ? Find the maximum weight w for which the system will remain at rest. wmax= ?
This is a Dynamic of Rigid Bodies subject. The 300-N block shown in the figure below is at rest on the rough horizontal plane before the force P is applied at t=0. The force P = 80t, where ‘P’ is in Newtons and ‘t’ is in seconds. a. What is the time in seconds, when the block starts to slide?b. What is the velocity of the block after 5 seconds?c. What is the distance travelled by the block after 5 seconds?d. Draw the S-t and V-t graph.
Can you please draw the free body diagram of the problem? 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. a. What is the coefficient of friction between the block and the inclined plane? b. What is the weight of the Block,w? c. What is the Normal Force, N? d. What is the Frictional Force, Ff?
Three stacked blocks are placed in an elevator as shown: Assume the stack of blocks is in contact with the floor of the elevator. If m = 11.9 kg and the elevator is accelerating upward at 1.9 m/s2, what is the normal force exerted on the 5m block by the 8m block? Express your answer in N, to at least one digit after the decimal point.
A block with mass m1 hangs from a rope that is extended over an ideal pulley and attached to a second block with mass m2 that sits on a ledge slanted at an angle of 20° (see figure below). Suppose the system of blocks is initially held motionless and, when released, begins to accelerate. If m1 = 7.25 kg, m2 = 2.25 kg, and the magnitude of the acceleration of the blocks is 0.150 m/s2, find the magnitude of the kinetic frictional force between the second block and the ledge. What is the value of the coefficient of kinetic friction between the block and the ledge?
A block of mass ?= 4.50 kg is pushed by a force ?⃗ of magnitude 8.80 N on a horizontal, smooth (frictionless) surface. The force makes an angle θ= 30. 0∘below the horizontal, as shown in the figure. a. Draw a free body diagram of the block b. Find the normal force exerted by the surface on the block. c. Find the acceleration of the block.
Block A, with mass mA= 1.5kg, is on a horizontal table connected to an ideal string, which goes over an ideal pulley connected to another block, block B, as shown in Figure 2. There is a coefficient of static friction of μs= 0.65, and a coefficient of kinetic friction of μk= 0.25 between block A and the tabletop. a)Draw a free body diagram for block A. b)Draw a free body diagram for blockB. c)Write Newton’s 2nd law for block A in terms of mA, T, g, and Fn. d)Write Newton’s 2ndlaw for block B in terms of mB, T, and g. c)What is the minimum necessary mass for block B(mB) needed to start block A moving?