Tommy is working on a physics problem and asks his friend Sarah to check his work. He is to draw a free body diagram for a man walking to the left and comes up with the following: He reasons, “The man is walking to the left, so the force of friction is acting in the opposite direction. The normal force should be opposite and equal to that of the gravitational force.” Is Tommy correct with his diagram and reasoning? If so, explain. If not, what mistake did he make?

Q: The three diagrams below show a block of mass m being pulled or pushed at constant acceleration ax…

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Q: d. Using your knowledge of the kinematic equations, determine an expression for the object's speed…

A: d. Let's make diagram according to the situation. Let  m= mass of an object h= intial height L =…

Q: A spaceship of mass m travels from the Earth to the Moon along a line that passes through the…

A: The objective of this question is to find the distance from the center of the Earth where the…

Q: Block A and block X are attached to a rope that passes over a pulley, as shown in the figure. A…

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Q: Starting at t =0 a net extermal force in the +z-direction is applied to an object that has mass 5.00…

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Q: a.)Calculate the coefficient of kinetic friction between block A and the tabletop. b.)A cat, also…

A: Given,    Weight of block A = 49.5 N  Weight of block B = 19.8 N   Weight of cat = 49.5 N

Q: 1. An object of mass m rests at the top of a smooth slope of height h, length L and angle 0. The…

A: From FBDN=mgcosθma=mg sinθ-fma=mg sinθ-μkNma=mg sinθ-μkmgcosθa=g sinθ-μkgcosθ  ...(1)

Q: A rocket takes off from Earth's surface, accelerating straight up at 73.2 m/s2. Calculate the normal…

A: Acceleration, a = 73.2 m/s²Mass, m = 83.4 kgNormal force, F = ?

Q: There are two possible outcomes. The middle block could move and the other two blocks could remain…

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Q: A) The students draw the following Free Body Diagram for the situation. Is thế Freë Body Diagram…

A: According to the given data, F= 40 N; M = 1.5 kg; Part (A): In the given FBD, net force is not…

Q: A book of mass M rests on a table. A block of mass m is placed on the book, as shown in the figure…

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Q: The distance between two telephone poles is 53.6 m. When a 1.00-kg bird lands on the telephone wire…

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Q: The diagram below shows an object of mass m= 20kg being acted upon by a force F=50N at an angle of…

A: The mass of the object, m = 20 kg. The applied force on the object, F = 50 N. The coefficient of…

Q: The position of a 2.4 kg mass is given by x = (2t³ - 2t2) m, where t is in seconds. Part A What is…

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Q: The figure shows a system in equilibrium, composed of three bodies connected through an ideal rope…

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Q: Three blocks are in contact with one another on a frictionless, horizontal surface as shown in the…

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Q: During a time interval of one second, a ball moves in the +x or -x direction (that is, to the right…

A: b) The acceleration is the rate of change of velocity.   In this case, the ball moves along right…

Q: A block of mass ?= 4.50 kg is pushed by a force ?⃗ of magnitude 8.80 N on a horizontal, smooth…

A: Given that, Mass of block= 45 kg Force = 8.80 N Angle = 300

Q: (d) Now someone briefly pushes the second block so that it begins to slide down. After the person…

A: a) Analyze the following figure. Applying Newton’s law in the direction perpendicular to the…

Q: During a time interval of one second, a ball moves in the +x or -x direction (that is, to the right…

A: (b) Ball moving to the right at constant speed:If a ball is moving at a constant speed, it simply…

Q: A boat moves through the water at a constant velocity of 7.8 m/s with two forces acting on it. One…

A: Speed of the boat is u = 7.8 m/s Forward push by the motor is F = 2.21 x 103 N

Q: Imre steps onto the elevator in a skyscraper. He finds a scale that someone has left on the floor,…

A: Let the mass of imre = m At t = 0 , the elevator is at rest that is the elevator has not yet started…

Q: Imre steps onto the elevator in a skyscraper. He finds a scale that someone has left on the floor,…

A: Given that: Here the scale reads the normal force exerted on the person.

Q: The following information pertains to questions 1, 2, and 3. A workman pulls a sled across an…

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Q: A decoration hangs at rest on a string. A second, horizontal string is knotted to the first, pulling…

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Q: The following steps summarize the strategy for solving two-dimensional force problems that require…

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Q: A 7400-kg helicopter accelerates upward at 0.75 m/s while lifting a 1400-kg frame at a construction…

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Q: A rocket takes off from Earth's surface, accelerating straight up at 37.2 m/s2. Calculate the normal…

A: Given data: Acceleration (a) = 37.2 m/s2, upward  Mass (m) = 81.4 kg Required:  The normal force…

Q: A rocket takes off from Earth's surface, accelerating straight up at 45.2m/s2. Calculate the normal…

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Q: Block 1 with mass 66 kg is sitting on a horizontal frictionless surface as shown below. It is…

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Q: A block of mass m is placed at rest on an inclined plane as shown below. The plane is frictionless…

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Q: An object of mass 0.77 kg is initially at rest. When a force acts on it for 2.9 ms it acquires a…

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Q: A rocket takes off from Earth's surface, accelerating straight up at 75.2 m/s?. Calculate the normal…

A: The forces acting on the astronaut are the weight force acting downwards , which is , W=mg and the…

Q: Two blocks are connected by a massless rope. The rope passes over an ideal (frictionless and…

A: Given values:Mass of the block  placed on the table, m1 = 12.25 kgMass of the block hanging…

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?”