To open a very heavy door, where is the best place to push the door?

Q: A neophyte player catches a 125 g ball moving at 25.0 m/s in 0.02 s. A professional player catches…

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Q: A father of 75-kg took his daughter of 35-kg to ice skating. They push off against one another…

A: Let us consider a father who took his daughter to ice skating. Consider a mass of father be (mf) in…

Q: A person on horse's back tends to fall back if the horse starts running all of sudden. Why?

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Q: The momentum of a 1500-kg car is the same as the momentum of a moving 5000-kg tow truck. What is the…

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Q: The weight of a body does not produce any moment of force

A: Moment of force = torque = r̅ ×F̅

Q: A man pushes two boxes with the same amount of force (because they look identical and he can’t see…

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Q: When a ball is tossed straight up,it momentarily comes to a stop at the top of its path. Is it in…

A: When the ball is tossed, the ball is under free fall after the ball leaves the hand.  Therefore, the…

Q: If you lower the window on a car while moving, an empty plastic bag can sometimes fly out the…

A: The Bernoulli’s principle for the constant depth is given as, Here, P is the pressure, v is the…

Q: A 75-kg petty thief wants to escape from a third-story jail window, Unfortunately, a makeshift rope…

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Q: A nurse pushes a gurney. The action force is the force exerted by the nurse on the reaction force…

A: Action force : the force exerted by the nurse on the gurney to find : the reaction force

Q: Two painters stand on a 10.0mlong plank of mass 300 kg. The plank rests on two pillars separated by…

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Q: A paddle ball is a child’s toy where a ball is attached to a paddle with an elastic string. As the…

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Q: You catch a ball within 1 millisecond from when the ball touches your hand. If the ball undergoes a…

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Q: The reason you are able to push a heavy sofa across a floor is that _____________.

A: When we push a sofa, the force that opposes its impeding motion is static friction.  Maximum value…

Q: A 50-kg swimmer dives horizontally off a 450-kg raft. If the diver's speed immediately after leaving…

A: Given value--- mass of swimmer = 50 kg. mass of raft = 450 kg. speed of swimmer = 3 m/s. We have…

Q: A man humping out of a moving train falls with his head forward. Why?

A: While a man is jumping out of the moving train the first body part that touches the ground is the…

Q: A small squishy ball is thrown against the side of a large cube of concrete. While the objects are…

A: From Newton’s third law of motion, the action and reaction pair are equal in magnitude.

Q: A loaded gun is dropped on a frozen lake. The gun fires, with the bullet going horizontally in one…

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Q: When a family of four with a total mass of 200 kg steep into their 1200 kg car, the can springs…

A: Given: The mass of the steep is 200 kg. The compression in the spring is 3 cm. The mass of the car…

Q: Why Is It Difficult To Move A Bike With Its Brakes On?

A: When we try to move a bike with its brakes on, the wheels of the bike will skid to a different…

Q: If you carry a heavy bag of groceries and bang your hand against the wall, the concept that best…

A: Here, the situation is we carry a heavy bag of groceries and bang our hand against the wall , we…

Q: Why are soldiers ordered to move out of step while crossing a bridge?

A: Soldiers may be ordered to break steps before crossing a bridge, as the rhythm of a large group of…

Q: A toboggan of mass 9.0 kg is moving horizontally at 24 km/h. As it passes under a tree, 13 kg of…

A: Mass of toboggan, m1=9 kg Initial speed of toboggan, u1=24 km/h Mass of snow, m2=13 kg Let the final…

Q: When we apply a force to an object under frictionless conditions, then the object will

A: The force on the object under frictionless condition is, F=ma Here m is the mass of the object. a is…

Q: Two rail cars roll without friction on a track.  The rail cars have different masses.   The heavier…

A: Using the conservation of momentum, mv+Mu=m+MVI

Q: A 4.8-m-long rope of mass 1.8 kg hangs from a ceiling.

A: The rope has mass M = 1.8 kg and length L = 4.8 m. It is suspended vertically so the tension in it…

Q: When you catch a water balloon, it’s best to start with your hand in motion, moving with the…

A: The goal is to reduce the momentum of the balloon to zero, so you should apply an impulse to do…

Q: A stack of four textbooks sits on top of a desk. The mass of the bottom book is 5.0 kg, on top of…

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Q: When a body at rest breaks into two pieces of equal masses, its parts will move O in the same…

A: In absence of external force on the body, the linear momentum remains conserved.  According to…

Q: The mass of an object is a measure of its __________. a. inertia b. energy c. force d. gravity

A: The mass of object is a measure of its inertia.

Q: You are on a spacewalk with another astronaut. You throw a tool to them. Your mass is 82 kg, the…

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Q: When catching a foul ball at a baseball game, why is it important to extend your bare hands upward…

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Q: You are a pitcher in a baseball game and you want the ball to go upwards when you throw it to the…

A: rolling backward when thrown will make ball rise and vice versa

Q: A 100 kg man balances a boy with mass of 25 kg on a teeter-totter,If the man is at 2 meters from the…

A: We equate the moments created by them on either side of the teeter-totter to find the boy's distance…

Q: When a basketball player dribbles a ball, it falls to the floor and bounces up.  Is a force required…

A: When the ball hit the ground then there is collision after the the momentum of the ball changes.…

Q: To make an object start moving on a surface with friction, will it usually require more, less or the…

A: Newton's first law of motion states that everybody continues its state of rest or uniform motion…

Q: What is the difference between kg‑mass and kg‑force?

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Q: A 100 kg man and 50 kg woman on ice skates stand facing each other. If the woman pushes the man…

A: Given data: The mass of man, mM=100 kg. The mass off woman, mW=50 kg. The final speed of man, vM=1…

Q: If your hands are wet and no towel is handy, you can remove some of the excess water by shaking…

A: If your hands are wet and no towel is handy, you can remove some of the excess water by shaking…

Q: 10. A 10-N force is exerted on a box, moving it 20 m in the same direction. O 2J 10 J 20 m 30 J 200…

A: Given: The applied force is 10 N. The displacement of the object is 20 m.

Q: An 6 kg object sits at 3 m, a 4 kg object sits at 6 m. Where should a 10 kg object be placed so that…

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Q: You have an elephant with mass of 15,000 kg and rhino with mass of 9,000 kg that are both…

A: The mass of an Elephant ( Me)= 15000kg The mass of Rhino (Mr) = 9000kg Both are accelerating at rate…

Q: A block with 20 kg mass put on the floor. The weight of the block is .. * 20 N 50 N O 100 N O 200 N…

A: Given The mass of the block is m=20 kg. The mass of the body will remain constant but the weight…

Q: The normal force: * Always points straight up O Is always equal to the force of gravity Always…

A: normal force usually points straight up when the object is placed on a horizontal surface.Also, the…

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.