What is the use of spring balance?

Q: A book of mass M is pressed against a vertical wall by a horizontal force F, as shown in the figure…

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Q: A tightrope walker located at a certain point deflects the rope as indicated in the figure. If the…

A: weight (w) = 130 pound θ1 = 4.3oθ2 = 3.6oLet the tension in the left end of rope = T1Let the tension…

Q: A frozen turkey that weighs 10N is dropped from an aircraft. It reaches a terminal velocity of 120…

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Q: There are two forces on the 11.1 kg crate in the overhead view of the figure below, but only one is…

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Q: When moving along a curved path, a motorbike driver Select one: O a. Leans inwards O b. Leans…

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Q: What happens if there is no Friction?

A: Friction is between solid surface, layers of fluid, and also between any two materials. If there is…

Q: Is friction useful?

A: Friction is useful in many ways in our daily life. Without friction, many life activities cannot be…

Q: An egg breaks when dropped to a concrete floor because a large force is exerted over a very short…

A: The correct option is True

Q: What is limiting friction?

A: The contact between two static surfaces  will generate some friction which is called limiting…

Q: When moving along a curved path, a motorbike driver, Select one: O a. Leans outwards O b. Leans…

A: When a motorbike driver is moving on a curved path, the centripetal force acts on the driver.

Q: What is the driving force between the two ends of

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Q: Does the acceleration of the balls change with the angle of incline? How does it affect the…

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Q: It is easier to pull than to push a lawn roller, why?

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Q: bearg was placed on a desk and pushed with a force but the board dia not move smoothly The student…

A: The F in the illustration is the frictional force acting opposite to the direction of the applied…

Q: Where are shoulder harnesses used?

A: The shoulder harness must also be positioned in such a way as to permit limited freedom to…

Q: Replace the loading system by an equivalent esultant force and couple moment acting at point A. 100…

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Q: Calculate the mass m needed in order to suspend the leg shown in (Eigure 1) . Assume the leg (with…

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Q: Name the three types of calipers used on disc brakes.

A: Braking is a system that resists motion by absorbing energy, the action is accomplished by means of…

Q: What Causes Friction?

A: Friction is a force that resists the relative motion between two objects or materials. The causes of…

Q: An acorn falls from

A: Kinetic energy = (1/2) mv2  Potential energy = mgh

Q: what is the acceleration of the system?

A: Given; Two masses M1 and M2 are attached to the ends of  a spring whichpasses over the pulley…

Q: A wrecking ball weighing 2.5 kilograms hangs from a uniform heavy-duty chain having a mass of 17 kg.…

A: Calculate the weight, Wb, of the ball.  Wb=mbg=2.5 kg×9.8 m/s2=24.5 kg·m/s2×1 N1 kg·m/s2=24.5 N…

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: What will happen to an object at rest when an unbalanced force acts on it?

A: According to Newtons 1st law, if a object is at rest or in uniform motion will remain in rest or in…

Q: When we lift or push something , our body muscles exert forces. Are these forces conservative.

A: When we lift or push something our muscles exert forces, these forces are not conservative.

Q: What does it mean to say something is in mechanical equilibrium?

A: Equilibrium is a state of system, which remains same throughout the time in reference to a…

Q: Statics is the study of: O A) how to keep things accelerating O B) how to keep things stationary O…

A: The study of how to keep things stationary is known as statics. The study of how to keep things…

Q: The mobile shown in figure below hangs at equilibrium. It consists of objects held by vertical…

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Q: Changes in motion are caused by:  Choose from the choices below.       unbalanced forces…

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Q: force needed to produce this acceleration.

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Q: Calculate the weight of the bird acting downware

A: Mass of the bird  = M =0.8 kg Weight = Mg

Q: What would happen if there was no friction?

A: Friction is a force which opposes the motion. It is a restriction force. This force arises only when…

Q: What is difference between viscosity and friction?

A: The viscosity of a fluid is a measure of its deformation by shear stress or tensile stress. Friction…

Q: Discuss how the shapes of different animals' bodies are designed to reduce friction

A: Required :  How the shapes of different animals' bodies are designed to reduce friction.

Q: The wings of an aeroplane are an example of a simply supported beam. Select one: True False

A: In simple supported beam, the beam is supported on its ends. On the other hand, in aeroplane the…

Q: How does increasing drag affect the distance a paper airplane will travel?

A: A paper airplane can be affected by various force like its weight ,drag etc.

Q: Block B hangs on a cable connected block A through a pulley as shown in the figure below. The two…

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Q: Calculate the average force per nail when Sarah (Figure 13.2), who weighs 120 pounds, lies on a bed…

A: The weight,

Q: a rope is stuck with a mass of 10 kg. Calculate the tensile forces in the rope.

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Q: Friction is necessary evil. Why?

A: Friction is necessary evil because it is harmful as well as useful for us.

Q: A 2-kg mass and a 4-kg mass hang freely at opposite ends of a light inextensible string which passes…

A: It is given that,

Q: Is a large brake on a bicycle more effective than a small one?

A: When brakes are on, there is no rolling of the wheels and the wheels slide. The sliding friction is…

Q: What are combining forces?

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Q: A crate that has a mass of 52.2 kg is held in equilibrium by two ropes as shown in the figure. Find…

A: The free-body diagram of the given crate is as below.

Q: What do the forces do?

A: In physics, force is something which occurs in a couple. Newton's third law: It states that whenever…

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.