While measuring kinetic friction, you give the friction block a tap, but not while measuring static friction. Why is this so?

Q: a 75 kg bodsled is pushed along a horizontal surface by two athletes. after the bobsled is pushed a…

A: The acceleration of the body can be calculated from the equation of motion a follows, v2=u2+2ad6…

Q: When a parachutist jumps out of an airplane when are the vertical drag forces maximum?  Can you help…

A: The drag force is a resistive force that acts on body, when the body is in motion through a fluid.…

Q: Give an example of applications of friction in our daily life?

A: When the surface of one object comes in contact with the surface of another, such that magnitude of…

Q: Which is normally greater, static friction or sliding friction on the same object?

A: Friction is the resisting force which opposes the motion of the object.

Q: An object of mass m slides down a slope of Ɵ angle with µ(kinetic) friction. velocity is V(zero) at…

A: When a body is in limiting equilibrium on an inclined plane, the angle of inclination of the plane…

Q: which of the following situations is the net force on the body zero?

A: In this question we have to answer in which situations the net force is zero. Please give positive…

Q: Is frictional force a conservative force or a non conservative force? Why it is called so?

A: If the total work done in moving a particle between two points is independent of the path taken,…

Q: Two robotic arms are used to push boxes from one place to another across a smooth surface (assume…

A: Required : Which arm will make the boxes reach a higher speed.

Q: -1.2m/s?, what is the net force acting on the vehicle?

A: negative acceleration means the speed reduces with time. Hence force will be negative means in…

Q: A 1000 kg car and a 2000 kg truck are both driving at the same speed. The both have tires with the…

A: Force acting on a moving body in case of friction is present is given as, F=ma-f=ma-μmg=maa=-μg

Q: Which of the following is the typical relationship between kinetic friction and static friction?

A: A friction force is the force which opposes the relative motion between the two bodies.

Q: A contestant in a winter sports contest pulls a 41 kg block of ice in the positive horizontal…

A: Given Mass M=41kg μs=0.1 μk=0.03

Q: A skier starts at rest at the top of a large hemisphericalhill (Fig. P7.63). Neglecting friction,…

A: Consider the mass of the skier be m, the skier’s speed at point A be vA, the skier’s speed at point…

Q: A hockey puck on a frozen pond is given an initial speed of 20.0 m/s. If the puck always remains on…

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Q: What is the difference between static friction and maximum static friction?

A: Friction - Friction is the force resisting the relative motion of solid surfaces, fluid layers, and…

Q: A car that weighs 1.30 * 104 N is initially moving at 40 km/h when the brakes are applied and the…

A: Since there are multiple sub parts posted, we will answer the first three sub parts. a) The equation…

Q: The coefficient of kinetic friction betweenthe tires of your car and the roadway is m. (a) If your…

A:

Q: Using Newton's First Law, explain why, in a frictionless environment, a cat that is under motion…

A: Using Newton's First Law, explain why, in a frictionless environment, a cat that is under motion…

Q: From a cannon of a circus, a bullet of r = 12 cm rises. Of lead material with a speed of 12.5 m / s;…

A:

Q: What can you say about the coefficient of friction, uk ? Assume the speed is low enough that air…

A: since the skier is moving with constant speed, the acceleration is zero. therefore, the net force…

Q: What is always true about the direction of a retarding force (such as friction or drag) compared to…

A: Given:                 Force is retarding force.

Q: In an elevator problem, how do we know to use only the 2nd Newton law of motion for scale or…

A:

Q: Calculate the forces of static friction and kinetic friction that could occur for a 3 kg block on a…

A: The given data are: m=3 kgμs=0.45μk=0.23

Q: Where will friction be greater, when the plane is horizontal or tilted? Why?

A:

Q: What average force is required to stop a 1600 kg car in 9.0 s if the car is traveling at 80 km/h?…

A: mass of the car (m) = 1600 kg time (t) = 9 sec speed (v) = 80 km/hr

Q: How can a friction coefficient be found in a physics problem?

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Q: How much braking force in pounds is needed to keep your 4500N car from sliding down a 550 hill?…

A:

Q: What is an example of static friction?

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Q: you are standing on a train which begins to accelerate away at 4.50 m/s. If you have a mass of 70…

A: acceleration (a) = 4.50 ms2mass = 70 kg

Q: What are some differences between the forces acting on a person when they are doing a squat vs a…

A: SQUAT:- Squatting is a popular exercise that targets the muscles in the legs, lower back, and core.…

Q: A 55 kg ice skater is gliding along at 3.5 m/s. Five seconds later her speed has dropped to 2.9 m/s.…

A:

Q: What are some of the most common examples of helpful friction?

A: Few examples are : i) Walking on the road is because of the helpful friction between the foot and…

Q: object’s  final speed

A:

Q: Why is kinetic friction measured by moving a block at constant velocity?

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Q: A 958-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s when it…

A:

Q: Describe real-world situation wherein friction may be desirable or undesirable.

A: Friction between the ground and the shoes of a person help him/her to walk properly on the ground…

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

A:

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: PUshes A mecnanic p e a 2.00KI0 Kigcar frem rest fo aspeed ofv,deiny S130Jofwerk in the process.…

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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: Out of all the following would weight, tension, static friction or kinetic friction be an example of…

A: Action at a distance force: Are those kind of force which are not actually in physically contact.…

Q: A 8.30-kg hanging object is connected by a light, inextensible cord over a light, frictionless…

A: Let m1 = 5.00 kg and m2 = 8.30 kg. Equations of motion for the masses using Newton’s second law are…

Q: I need help with this Hw Problem.

A:

Q: For typical rubber-on-concrete friction, what is the shortest time in which a car could accelerate…

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Q: As a protest against the umpire’s calls, a baseball pitcherthrows a ball straight up into the air at…

A:

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.