EXAMPLE Atwood's Machine When two objects of unequal mass are hung vertically over a frictionless pulley of negligible mass, as shown in Figure 15a, the arrangement is called an Atwood machine. The device is sometimes used in the laboratory to measure the free fall acceleration. Determine the magnitude of the acceleration of the two objects and the tension in the lightweight cord.

Q: 1. The picture shows a gibbon hanging from a tree branch in a tropical forest. If you know the mass…

A: The two forces are T1 and T2mass of gibbon = m

Q: Insect Dynamics. The froghopper (Philaenus spumarius), the champion leaper of the insect world, has…

A: mass of froghopper (m) = 12.3 mg = 0.0000123 kg vertical start speed (v) = 4 m/stime of contact with…

Q: Q5/ The plate is subjected to the two forces at A and B as shown. If e = 60°, determine the…

A: The force diagram for the given situation can be drawn as below, Here Φ represents the direction…

Q: 2. In the figure shown, what is the magnitude of the acceleration of the vertically suspended block…

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Q: **118. The basic concepts in this problem are presented in Multiple- Concept Example 9. A 225-kg…

A: Find the coefficient of static friction between the crate and the incline?

Q: 8. GARDENING Anne and Henry are lifting a stone statue and moving it to a new location in their…

A: force exerted by Anne on statue = 120 N , 60o below the horizontal force exerted by Henry on statue…

Q: Select the correct expression relating the force that the rope exerts on the child T and his…

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Q: Exploration 3 Accelerating the cart with a different net force and constant total mass Exploration…

A: 3.1 Consider the FBD below.

Q: Pulley Problem a. Calculate the acceleration of the masses m1 and m2 that both sit on inclines with…

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Q: Problem 7: A crate sits on a rough surface. Using a rope, a man applies a force to the crate as…

A: Here the crate is not moving Then frictional force acting on it is static in nature

Q: 10. Draw a force diagram for the person: when stepping off when the stepping foot strikes the…

A: The forces acting on the person on both the cases are friction, normal reaction and force due to…

Q: Two adults and a child want to push a wheeled cart in the direction mark x in the figure. Two adults…

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Q: Can someone walk me through this practice problem.  What is the normal force exerted on the board…

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Q: 1) Two children pull a third child on a toboggan (shown from the top, assume up is north). Assuming…

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Q: 3. Braking Load A Toyota Sienna with a gross weight of 5300 pounds is parked on a street with an 8°…

A: The given data are listed below with appropriate variables. Here, W denotes the gross weight of the…

Q: Static Friction Force Revisited Now let's go back and consider the static situation again. Let the…

A: Static friction fs  = μ Ν  Hence we can calculate static friction by finding the value of N.

Q: Here the stone is sliding down a friction-free incline. (a) Identify the forces that act on it, and…

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Q: 4) Now your two equations have just two unknowns, the Tension and the acceleration of the block.…

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Q: 1. The picture shows a gibbon hanging from a tree branch in tropical forest. If you know the mass of…

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Q: 1. Draw a force diagram for the motionless cat on a rug. Label the forces and use equality marks on…

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Q: A force F is applied to an object. The x component of the force varies with the x coordinate of the…

A: in this question , force versus position graph has been shown . and force varies with displacement…

Q: Exploration 3 Accelerating the cart with a different net force and constant total mass Exploration…

A: In the given situation let us assume that friction force tends to zero. Then we can assume mass and…

Q: Q7 The two blocks shown start from rest. The horizontal plane and the pulley are frictionless, and…

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Q: Suppose you put your book bag on the table and want to move it out of the way so you can set up your…

A: Given : mass of the bag, m=18 Kg Coefficient of the friction, μ=0.74   Determine : Force required to…

Q: Two forces are applied to a car in an effort to move it, as shown in the figure below. (Let  F1 =…

A: Given data: Forces: F1=415 N and F2=352 N Angle extended by the force F1 is θ1=100 Angle extended by…

Q: Example: An object of mass 5 kg is released from rest 10 m above the ground and allowed to fall…

A: Net force acting on the ball can be given by Substitute the value of a in above equation

Q: 8. A ball moves through the air with the following force diagram. Does the listed force have a…

A: When a ball moves through the air as shown in the force diagram. This force acts on the block is the…

Q: 7. A racing car drives at constant speed around the horizontal track shown in. At points A, B, and…

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Q: A 1280 kg car pulls a 400 kg trailer. The car exerts a horizontal force of 3700 N against the ground…

A: M = 1280 kg m = 400 kg F = 3700 N μ = 0.14 FT = ?

Q: 8. A student was given the following problem: "The drawing shows a person (weight push-ups. Find the…

A: Fig: 1   The FBD shown in the…

Q: Example Problem #4 A girl on a toboggan is sliding down a snow-covered hillside. The girl and…

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Q: Example 7: Rocket sleds were used to test aircraft and its effects on human subjects at high speeds.…

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Q: * (6) What horizontal force must be applied to the cart shown in Figure-2, in order that the blocks…

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Q: Friction Group Practice Problem: The coefficient of dynamic friction between the grass and a 200 kg…

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Q: You want to move a 500-N crate across a level floor. To start the crate moving, you have to pull…

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Q: Bob wants to do Michael Jackson’s Antigravity dance move, where he leans forward while keeping his…

A: Given : Mass of bob = 50 kg Weight = mg = 50×10=500 N if g = 10 m/s2 μs=0.5 We know  μ=tanθ (b) For…

Q: PA gardener mows a lawn with an old-fashioned push mower. The handle of the mower makes an angle of…

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Q: Problem: A 80.0 kg person stands on a Newton scale in a 40.0 kg dumbwaiter. The person pulls on the…

A: we know the  weight in the elevator when it is moving in the downward direction   is F=m(g-a) where…

Q: A worker in a factory slides a heavy box up a ramp into a truck. The box has a mass of 84 kg, and…

A: The weight of the box can be determined as follows. w=mg=84 kg9.81 m/s2=824.04 N

Q: Example 1: Fridge push A person drives a cart, Cart 1, to the right while pushing another cart, Cart…

A: According to the Newton's third law, for every action there is an equal and opposite reaction.

Q: * (6) What horizontal force must be applied to the cart shown in Figure - 2, in order that the…

A: To determine: Horizontal force applied to the cart.

Q: Two adults and a child wants to push a wheeled cart in the direction marked in x. The two adults…

A:

Q: 6. Draw a force diagram for a skydiver who has just left the plane and is still speeding up. Label…

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Q: An elderly man is picking up a Christmas gift from underneath the family tree. Use the information…

A: (a)

Q: 7. Draw a force diagram for a skydiver who is descending at a constant velocity. Label the forces…

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Q: 2. Draw a free-body diagram of a baseball catcher at the instance the ball strikes his glove.

A: The baseball catcher generally pull their hands back while catching the baseball, to reduce the…

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”