Consider an ideal pulley system. If you pull one end of the rope 1m downward with a 50-N force, show that you can lift a 200-N load one-quarter of meter high.

Q: A motor used 120-watts of power to raise a 15-newton object in 5.0 seconds. Through what vertical…

A:

Q: If it were not for air resistance, why would it be dangreous to go outdoors on rainy days?

A: If there was no air resistance, the only force acting on raindrops as they fell would be the Earth’s…

Q: Explain the term escape velocity?

A: Escape velocity is defined as the speed at which an object travels to break free from either the…

Q: arger force? inee bs oth

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Q: What is a lever? State its principe?

A: Lever can be defined as

Q: What is Equilibrium? Rest is only one form of equilibrium, what is the other form of equilibrium?

A: When the sum of all force and sum of all torque acting on the system is zero, then the system is…

Q: How far does a freely falling apple drop in 6.6s after being released from rest?

A: The relation between distance covered by apple and total time taken is given by,…

Q: Consider a spring with a spring constant of 180 N/m hanging vertically from the ceiling. If a 8 kg…

A: Given, the spring constant of the spring, k= 180 N/m Mass attached, m= 8 kg

Q: A 3kg book is held 2m above the floor for 40 seconds. The work done is ___?

A: GIven data: The mass of the book is m=3 kg The height is h=2 m The time is t=40 s

Q: Riders rode a small sled down the chute which ended with a horizontal section that caused the sled…

A: Given, Height of chute H= 9.76 m Length of chute L = 54.3 m Combined weight of rider and sled m =…

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: A 50-N force is the only force acting on a 2-kg crate that starts from rest. At the instant the…

A: Given: The force is F=50 N. The distance is d=2 m. The mass of crate is m=2 kg.   The expression…

Q: Compare the two springs having the same load (100g) with different Spring strengths. (Spring one has…

A: Spring- i t is a device used to store mechanical energy. Strength of an spring is its ability to…

Q: At full swing, a pendulum 8m long, subtends an angle of 34 degrees. How high does the bob of the…

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

A: Torque with respect to fixed end will be a constant with respect to fixed reference positionThat is,

Q: Shown below is a waterslide constructed in the late 1800's. This slide was unique for its time due…

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Q: the speed o ate the bear

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Q: In raising a 5000-N piano with the pulley system, the workers note that for every 2m of rope pulled…

A: The work is equal to the force time the distance.

Q: Calculate the change in gravitational potential energy of a 50 kg mountain climber after moving 8.8…

A: Consider mountain climber starts moving from 0 height. Write down the given values using suitable…

Q: How does the average number of drops required to break open awhelk depend on platform height for a…

A: The average number of drops required to break open a whelk depends on platform height.

Q: What is escape speed?

A: When a body is thwon upward away from the surface of the earth, it goes upto a maximum height and…

Q: A 70 Kg person walking at 1 m/sec bumps into a wall and stops in a distance of 2.5 cm in about 0.04…

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Q: The unit of . .is Kg.m/s2. * Mass O Power O Energy Acceleration Weight

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Q: Which requires more work- strectching a strong spring a certain distance or stretching a weak spring…

A: Let Ws is required work done for stretching strong spring and Ww is required work done for weak…

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: A Body that weighs W newtons falls from a height of 600mm and strikes a spring whose scale is 7…

A: Given that:- Spring constant=7N/mm

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: An elevator is carrying a load of 1550kg, 75 meters up in 4 minutes. The counterweight is 1150kg.…

A: Given that---- m = 1550 kg h = 75 m t = 4 min Question ❓ Work done by an elevator = ? And power need…

Q: In the hydraulic machine shown, you observe that when the small piston is pushed down 10 cm, the…

A: The displacement times the force for both the piston is the same.

Q: Show that about 786W of power is expended when a 500-N barbell is lifted 2.2m above the floor in…

A: The work done in lifting a 500N barbell 2.2m above the floor is

Q: Forces of 3.0N and 4.0N act at right angles on a block of mass 2.0kg. Show that the acceleration of…

A: Write the expression for the resultant of two forces on right angle to each other.

Q: A thick rope is stronger than a thin rope of the same material. Is a long rope stronger than a short…

A: A thick rope is stronger than a thin rope because the cross sectional area of the thick rope is…

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: "Explain how ""elastic potential energy "" dramatically changed the sport of pole vaulting when…

A: It is because, the flexible fiberglass can bend easily as compared to stiffer wooden poles.

Q: Sammy uses a pulley to hoist a crate 10 meters high in 5 seconds. Sammy applies 980 N of force to…

A: Force (F) = 980 N  Displacement (S) = 10 m  time (t) = 5 sec

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: Jack weighs 65 kg. What is Jack’s height of jump if he exerts a normal force of 1300 and his center…

A: This question can be solved by breaking down the boy's motion into two parts. The two images below…

Q: The vertical spring shown below stretches 2 inches with a 1 kg weight suspended from it.  By how…

A: given: mass suspended M=1 Kg stretch in vertical spring x1 = 2 inch = 0.0508 m

Q: Are you "lazy"? answer according with Newton's first law

A: Newton's first law of motion states that an object at rest stays at rest and an object in motion…

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…

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.