In a common physics demonstration, a bowling ball is suspended from the ceiling by a rope. The professor pulls the ball away from its equilibrium position and holds it adjacent to his nose, as shown below. He releases the ball so that it swings directly away from him. Does he get struck by the ball on its return swing? What is he trying to show in this demonstration?

Q: In an elastic head-on collision, a 0.60 kg cart moving at 5.0 m/s [W] collides with a 0.80 kg cart…

A: u is the initial velocity v is the final velocity mass of cart 1, m1 = 0.6kg (moving west) mass of…

Q: A ball rebounds vertically from a horizontal floor to a height of 20 m. On the next rebound it…

A: h1 = 20 m (vertical height reached after first rebound)h2 = 14 m (vertical height reached after…

Q: A 50 kg man is running until he hits a swing with a mass of 2 kg. If he was running at 2 m/s, find…

A: Conservation of total energy  It states that the sum of kinetic energy+ potential energy is same at…

Q: A 3,00 kg block resets on a horizontal frictionless table a pendulum is built with a string and a…

A: Conservation of linear momentum principle states that the when two bodies of massm1 and m2 (one…

Q: An adventurous archeologist (m = 84.5 kg) tries to cross a river by swinging from a vine. The vine…

A: Given data: Mass (m) = 84.5 kgThe length of the Vine (L)= 10 mThe speed at the bottom swing (V) =…

Q: Tarzan, who has a mass of 80 kg, holds onto the end of a vine that is at a 12° angle from the…

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Q: An 18g bullet is fired into 4kg block that is suspended from the ceiling by ropes. The bullet comes…

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Q: A block of mass mĄ= 20kg on an inclined plane and a bucket of mass mbucket = 13kg are attached to…

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Q: Someone has played a practical joke on you, and your favorite chair is stuck at rest in the middle…

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Q: A stone is thrown vertically upward and feels no air resistance. Upon rising, a.its kinetic energy…

A: Required : The correct option.

Q: A goft ball of mass 0.058 kg is hit off the tee at a speed of 25 m/s. The golf club was in contact…

A:

Q: Two blocks of masses m and 3m are placed on a frictionless, horizontal surface. A light spring is…

A:

Q: Why does the vertical component of velocity for a projectile change with time, whereas the…

A: The forces acting on a projectile is the gravity due to weight of the particle and the force applied…

Q: In a dramatic rescue mission, Dr. Porter was up on a 15-meter-high cliffside where she saw a box of…

A:

Q: A stroboscopic photo of a club hitting a golf ball, such as the photo shown in the figure below, was…

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Q: A young child is standing on a stationary skateboard. The child and the skateboard together has a…

A: Given Data: Mass of child and skateboard is M = 40 kg. Initially child and skateboard are at rest…

Q: A golf ball hits a wall and bounces back at 3/4 the original speed. What part of the original…

A:

Q: A stroboscopic photo of a club hitting a golf ball, such as the photo shown in the figure below, was…

A: Given, a stroboscopic photo of a club hitting a golf ball. The ball was initially at rest u = 0 m/s,…

Q: A bullet of mass m and speed v passes completely through a pendulum bob of mass M as shown in the…

A: Mass of the bullet 'm' Mass of the Bob in pendulum 'M' Bullet emerges out with a speed of v/2 The…

Q: A block of mass M is placed on the top of a bigger block of mass 10 M as shown in figure. All…

A: When the mass M moves in the left or from top to bottom, the mass 10 M moves rightwards.

Q: A 4 kg block moving right at 6 m/s collides elastically with a 3 kg block moving right at 2 m/s.…

A: (given)             Mass (m1) of a block = 4 kg                   And velocity (v1) = 6 m/s  Mass…

Q: u have a toy that uses a spring to shoot darts. A dart has a mass of 5 g, and the spring has a…

A: Givenm=5 g=5×10-3 kgk=666 N/mx=5 cm=5×10-2 mf=14 N

Q: wo books slide across a friction less surface. one book has a mass of 6.2 kg and it slides to the…

A: GivenFor book 1, sliding to rightm1=6.2 kg   , u1=9.8 m/sFor book 2, moving to leftm2=3.8 kg  ,…

Q: Two gold hangers with masses 2 kg and 4 kg are attached to a string over a pulley. The mass of the…

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Q: Which requires more work to stop, a light truck or a heavy truck moving with the same momentum.

A: We know , work done (W) = change of kinetic energy. now K.E = 1/2mv^2 And momentum (P) =mv

Q: In the figure, a ball of mass m-5 kg was given an initial speed of 1.04 m/s at position A. find the…

A: Given: The mass of the ball is 5 kg. The initial speed of the ball is 1.04 m/s. Introduction: When…

Q: A 4 kg block moving right at 6 m/s collides elastically with a 2 kg block moving right at 3 m/s.…

A: In an elastic collision, both the total momentum as well as the total kinetic energy of the system…

Q: Its momentum is conserved, because there is no net force acting on it. Its kinetic energy is…

A:

Q: 0.002 kg bullet leaves the barrel of a gun at at speed of 300 m/s. a) Find the kinetic energy of the…

A: Given ,      mass of the bullet = 0.002 kg      speed of the bullet = 300 m/s

Q: Two boxes of different mass are at rest. If both boxes are acted upon by equal force, which of the…

A:

Q: Jane has a mass of 50 kg and starts from a high of 5 m above the ground. At the bottom of her swing,…

A: mass of jane (m) = 50 kg initial height of jane (h) = 5 m mass of tarzan (M) = 70 kg

Q: An adventurous archeologist (m = 5 85.0 kg) tries to cross a river by swinging from a vine. The vine…

A: Archaeologist wants to cross the river with the help of vine. Let, the mass of archaeologist is 85…

Q: A 25-g bullet traveling horizontally at 210 m/s penetrates a stationary 3-kg block of wood resting…

A:

Q: An adventurous archeologist (m = 85.5 kg) tries to cross a river by swinging from a vine. The vine…

A:

Q: A bullet weighing 6.00 g is fired horizontally at a speed of 458 m/s into a wooden block weighing…

A:

Q: A football is dropped from a height of 20 m above the ground. It rebounds to 3/4 of its original…

A: Required : Which statement is true.

Q: When a rubber ball dropped from responses off the floor, this direction of motion is reversed…

A: We will use newtons third law of motion to solve this question .

Q: A 5.00-kg ball is hanging from a long but very light flexible wire when it is struck by a 1.50-kg…

A:

Q: John steps off a diving platform that is 10 m above the water. If no air resistance is present,…

A: Required : Decrease in which physical quantity.

Q: Rank in order, from greatest to least, the kinetic energies of the sliding pucks.

A: Kinetic energy of A, KA = 0.5 x 1 x 2 x 2 = 2 J Kinetic energy of B, KB = 0.5 x 1 x 3 x 3 = 4.5 J…

Q: Two iceboats (one of mass m, one of mass 2m) hold a race on a frictionless, horizontal, frozen lake.…

A:

Q: Two iceboats (one of mass m, one of mass 2m) hold a race on a frictionless, horizontal, frozen lake.…

A:

Q: A spring with a force constant of 12 N/m rests horizontally on a table and projects balls with a…

A: Given: The mass of the ball is 8.3x10-3 kg. The spring constant is 12 N/m. The compression in the…

Q: As shown in the figure below, a ball is suspended vertically (at rest) from a pivot point by a…

A: a) The net force along horizontal and vertical direction, From (I) and (II),

Q: Which has the larger linear momentum: a 2,500-kg houseboat going 9 m/s or a 800-kg speedboat going…

A: The linear momentum is given by  p = m v  where, m is mass and v is velocity.

Q: While Lost-a-Lot ponders his next move in the situation described and illustrated as shown, the…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: 200 m/s >10 gr www 5 kg 2 cm Stagnant on a frictionless horizontal surface a 5 kg block with a…

A: Given The mass of the bullet is mb=10 g=10×10-3 kg. The mass of the block is mB=5 kg. The spring…

Helmholtz Free Energy

The Helmholtz free energy is a thermodynamic potential used to calculate the measure of useful work from a closed system. This system is kept at constant temperature and volume. German physicist Hermann Helmholtz introduced this concept in 1882.