Newton applies a force of 50N to the end of lever, which is moved a certain distance. If the other end of the lever moves one-third as far, show that force that exerts is 150N.

Q: repulsive force between

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Q: An elevator accelerates upward at 1.6m/s^2. A passenger with a mass of 79kg stands on the scale…

A:

Q: A friend drops a 0.625-kg basketball from 2.6 m above you. What is force exterted by your hands to…

A: In this question we are given that a friend drops a 0.625-kg basketball from 2.6 m above you and we…

Q: Nellie Newton applies a force of 50 N to the end of a lever, which is moved a certain distance. If…

A: It is given that

Q: How much power (in kW) is required to raise an elevator with a mass of 1,855 kg at a rate of 51…

A:

Q: Does a fully charged flashlight battery weigh more than the same battery when dead? Defend your…

A: Given: A battery

Q: The unit of work is the (write the whole word, not just the single letter)

A: The energy transfer from or to a body by the force applied on it along its displacement is said to…

Q: Using Newton’s second law of motion, show that the net work done on an object is equal to the change…

A:

Q: Why do you think seat belt is important? Relate this to physics

A: Newton's first law of motion : Newton’s first law states that if a body is at rest or moving at a…

Q: the speed o ate the bear

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Q: A car carrying a 75-kg test dummy crashes into a wall at 25 m/s and is brought to rest in 0.1 s.…

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Q: A simple rearrangement of Newton’s second law gives fnet 5 ma. Show that a net force of 84 N exerted…

A:

Q: Consider an ideal pulley system. If you pull one end of the rope 1 m downward with a 50-N force,…

A: For an ideal pulley system, the input work is equivalent to the output work. When the one end of the…

Q: Name the form of energy which is wound up watch spring possesses.

A: A wound up watch spring has the potential energy because of its wound up state.

Q: How are Newton's laws and the law of conservation of energy very important?

A: Newtons laws of motion are foundation of classical mechanics. Newton's laws of motion used to solve…

Q: What is the ΔKE if a grocery cart is pushed 12 m with a force of 15N?

A: Given Force on grocery cart F = 15 N Distance to which grocery cart is pushed d = 12 m To find…

Q: Sam rolls a ball off a tabletop. Compared with a slow roll , will a faster-moving ball hit the floor…

A: Faster moving ball will hit the ground with greater speed.

Q: A car carrying a 75-kg test dummy crashes into a wall at 25m/s and is brought to rest in 0.1s. Show…

A: Given,            m=75kg            v=25m/s            t=0.1s

Q: Consider a 40-kg block of cement that is pulled sideways with a net force of 200 N. Show that its…

A: Consider a cement block having mass m and it pulled sideways with the force F.

Q: A simple rearrangement of Newton's second law gives Fnet 5 ma. Show that a net force of 84N exerted…

A: As mentioned, the expression of net force from Newton’s second law of motion is:

Q: How much does a 0.25kg apple have with an acceleration of 9.8m/s

A: Given data:  Mass (m) = 0.25 kg Acceleration (a) = 9.8 m/s2 Required: Force (F)

Q: Is power a scalar quantity?

A: Power is a scalar quantity. A quantity which depends on direction a vector quantity. A quantity…

Q: Find the gravitation potential energy of a 65-kg person sitting on a diving board that is 3.0 m high

A: Givenmass (m)=65 kg Height (h)=3.0 m

Q: On her way to visit Grandmother, Red Riding Hood sat down to rest and placed her 1.20-kg basket of…

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Q: Show that 2.4J of work is done when a force of 2.0N moves a book 1.2m?

A: Expression for work done is,

Q: Show that a machine that has an input of 100 J and an output of 40 J is 40% efficient.

A:

Q: Consider a mass of 1kg accelerated 1m/s2by a force of 1N. Show that the acceleration would be the…

A: Given information: Here, m1 and m2 are the mass of the two blocks, F1 and F2 are the applied force…

Q: If a man moves a large box that weighs 1 Newtons 10 meters in 8 seconds, how much power was used?

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Q: How are hovercrafts supported

A: With the help of a large fan air pumped below the skirt to get the required lift. Once the…

Q: How much power (in kW) is required to raise an elevator with a mass of 1,915 kg at a rate of 59…

A: Mass of elevator m = 1,915 kg Height h = 59 m Time rate t = 1 min = 60 sec Power = ? In kW

Q: A golf ball is released from rest from the top of a very tall building. Calculate the locity of the…

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Q: against which it can push?

A: Rockets and engines in space work according to Newton's third law of motion i.e Every action has an…

Q: If a 1 kg ball and a 5 kg ball of the same size are dropped from a height of 3 m at the same tims…

A: The air resistance of a falling object depends on the area of the cross-section. Therefore more the…

Q: what is the significance of the “rise” and the “run “and their ratio?

A: The distance measured in the up or down direction is known as the rise. The distance measured in the…

Q: What combination of transformations is shown below?

A: Required : The combination of transformation.

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.