A 400-kg bear grasping a vertical tree slides down at constant velocity. What is the friction force that acts on the bear? Discuss how “constant velocity” is the key to your answer.

Q: Placing rough "grip strips" on a tile floor increases the on it, which reduces the possibility of…

A: Required : Effect of putting grip strips on a tile floor.

Q: If the net force acting on a sliding block is somehow tripled, by how much does the acceleration…

A: Write the expression for acceleration,

Q: Illustrate and solve the given. A shopper in a supermarket pushes a loaded cart with a horizontal…

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Q: If a body is moving with constant velocity, does it mean that there is no force acting on it?

A: If a body is moving with constant velocity then it does not mean that there is no force acting on…

Q: Suppose you jump from the cliffs of Acapulco and perform a perfectswan dive. As you fall, you exert…

A: When some unbalanced forces are applied to a body then it produces an acceleration in the body. This…

Q: Force of friction is an example of ?

A: Force of friction is an example of a contact force.

Q: Two skydivers jump from a plane at the same time. Skydiver 1 has a mass of 50 kg and Skydiver 2 has…

A: Terminal velocity of skydivers

Q: How does a helicopter get its lifting force?

A: The helicopter gets the lifting force by pushing the air downwards and it gets the thrust from the…

Q: How does friction affect acceleration?

A: The force due to friction works in the opposite direction of the motion.

Q: 120-lb person stands on a bathroom spring scale while riding in an elevator. If the eleva- tor has…

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Q: What is the net force acting on an 85.9kg person resting on the floor?   Show solution

A: Given Data : The mass of the person is given as m = 85.9 Kg.

Q: Which of these planes experiences less drag, and therefore flies faster?

A: Answer:The first plane(the black plane)

Q: A box of massmis placed on a frictionless table and connected, via a string, to another box of…

A: Given: Mass of box on table = m, Mass of box hanging through string = M.

Q: an astronaut on the moon lifts a rock over his head and than drops it. Discuss what force acts on…

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Q: When the force is constant, how does the final velocity relate to the distance traveled?

A: As per Newton’s law, the force on an object can be represented as, Here, m and a represent the…

Q: What is the third-law paired force to the support force on your butt right now?

A: According to the question The third law paired force to the support force on your butt right now, is…

Q: Find the acceleration (in m/s2) produced in a body of mass 4 kg when a force of 24 N is applied on…

A: According to the Newton's second law  Net force = mass x acceleration

Q: A stalled car is being pushed up a hil by 3 people, and it is moving at a constant speed. the net…

A: Mathematical Proof Object is moving with constant velocity v = k m/s So the change in velocity Δv= 0…

Q: The figure above shows the forces exerted on a block that is sliding on a rough horizontal surface:…

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Q: The free-body diagram of a car in a skid with its brakes locked up is best represented by: app

A: In this question we have to determine which diagram depicts the free-body diagram of a car in a skid…

Q: In tearing a paper towel or plastic bag from roll ,why is sharp jerk more effective than a slow…

A: To understand this, you can use the concept of inertia and Newton’s second law of motion. Initially,…

Q: . Since a bucket of water is “weightless” in space, would it hurt tokick the bucket? Explain.

A: A bucket in space

Q: Why does a bungee jumper feel weightless during the jump?

A: A bungee jumper feels weightlessness when he jumps the platform. When the jumper is standing on the…

Q: Roan applied a net horizontal force of 145 N to Rey with mass 80 kg who is resting on the edge of a…

A: Given data: Force F =145 N Mass m= 80 kg

Q: As you increase your push, will friction on an object also increaes?

A: The force of friction is defined as the force that opposes the motion of an object. It is a force…

Q: The figure shows an acceleration-versus-force graph for a 200-g object. What should be the value of…

A: Newton's second law of motion determines the force experienced by a body which varies linearly to…

Q: You push a box up a slope with kinetic friction at a constant speed. Which of these is true?

A: Given that if we push a box up a slope with kinetic friction at a constant speed, then which…

Q: What is the mass of a bowling ball that exerts a downward force of 160 N on your skull after gently…

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Q: If you push on a heavy box that is at rest, you must exert some force to start its motion. Once the…

A: From Newton’s first law of motion, it can be inferred that an object at rest or in motion remains at…

Q: When I play tug-o-war with my 47 kg dog, I can "win" with a 380N pull at a 25° upward tilt - he…

A: mass of dog (m) = 47 kg applied force (F) = 380 N @25o upwards

Q: If the net force is changing, why isn't the acceleration changing? Explain.

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Q: How does the mass of an object affect its acceleration?

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Q: When landing after a spectacular somersault, a 50.0 kg gymnast decelerates by pushing straight down…

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Q: If a Mack truck and a motorcycle have a head- on collision, upon which vehicle is the impact force…

A: Newton's third law of motion states that to every action there is an equal and opposite reaction.…

Q: What acceleration will result when a 12-N net force applied to a) 3-g object and b) 6-g object?

A:

Q: Why does a heavy parachutist fall faster than a lighter parachutist who wears a parachute of the…

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Q: Why Does A Horse Pull Its Cart Harder During The First Few Steps Of Its Motion?

A: A horse has to pull the cart harder during the first few steps of his motion because the horse has…

Q: If there is friction, why do object/motion accelerates and some remain stationary?

A: Defination Friction is always opposes the relative motion of object  Friction always work in the…

Q: What force is needed to accelerate a sled ( mass=55kg) at 1.4 m/s2 on horizontal frictionless ice?

A: The definition of force is F = ma

Q: Your empty hand is not hurt when it bangs lightly against a wall. Why does it hurt if you are…

A: From newton's 2nd law we have,

Q: What is the net force experienced by a 2N object sitting on a table with a 5 N object on top of…

A: Consider the free-body diagram for the given objects as follows.

Q: When you increased the applied force (before the object started to slide), what happened to the…

A: solution is given as :-

Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!