A running back with a mass of 80 kg and speed 8 m/s collides with, and is held by, a 120 kg defensive tackle going in the opposite direction. How fast must the tackle be going before the collision for their speed afterward to be zero?

Q: A boy of mass 45 kg stands on one end of a boat of mass 800 kg and length 4.5 m. The boat  moves at…

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Q: Find resultant

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Q: A 78.0-kg fullback running east with a speed of 5.10 m/s is tackled by a 82.0-kg opponent running…

A: Given, mass of fullback runner = 78.0 kg speed of fullback runner = 5.10 m/s east mass of opponent…

Q: A 750-kg car stopped at an intersection is rear- ended by a 1730-kg truck moving with a speed of…

A: Given data *The mass of the car is mc = 750 kg *The mass of the truck is mt = 1730 kg *The speed of…

Q: A BMW of mass 2.26 × 103 kg is traveling at 41.5 m/s. It approaches a 1.40 × 103 kg Volkswagen going…

A: Given data :  Mass of bmw car mb = 2.26 × 103 kg  Velocity of bmw car before collision vb = 41.5 m/s…

Q: The driver of a car (1100 kg) traveling at 30 m/s on dry concrete sees a deer in the distance and…

A: The mass of the car m=1100 kg. The velocity of the car v=30 m/s. Standard values: Coefficient of…

Q: A 35 kg girl running 2.3 m/s jumps into a stationary 8.0 kg wagon. What is the speed of the…

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Q: Phrank has a mass of 80 kg and runs across the front of the classroom with a speed of 4 m/s, then…

A: Let the mass of Phrancine be m. Then by conservation of momentum before and after jumping on the…

Q: In a particular crash test, a car of mass 1200 kg collides with a wall. The initial and final…

A: Given data, Mass m=1200 kg Initial velocity u=-15 m/s Final velocity v= 2.6 m/s Collision Time t=…

Q: Two cars of equal mass are approaching an intersection. One of the cars moves east at 13 m/s, the…

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Q: Water leaves a hose at a rate of 2.8-kg per 2.1-s with a speed of 15.9-m/s and is aimed at a toy car…

A: Given,               mass, m =  2.8 kg               time, t = 2.1 s               final velocity,…

Q: Note: Take East as the positive direction. A(n) 88 kg fisherman jumps from a dock into a 132 kg…

A: Given : m = 88 kg M = 132 kg v = 4.5 m/s

Q: Two people (75 kg and 50 kg) skate together in a straight line at a speed of 5 m/sec. They push each…

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Q: In the figure, two long barges are moving in the same direction in still water, one with a speed of…

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Q: n the railroad freight yard, an empty freight car of mass m rolls along a straight level track at…

A: Given m1=m (mass of freight car) u1=1.10 m/s (initial velocity of freight car) m2=5.70m (mass of box…

Q: A 75 kg man rides on a 39 kg cart moving at a velocity of 2.3 m/s. He jumps off with zero horizontal…

A: Given,

Q: A flying squid (family Ommastrephidae) is able to "jump" off the surface of the sea by taking water…

A: Given Let’s consider upward direction as positive   Mass of the squid ms = 0.71 kg Mass of water mw…

Q: Water leaves a hose at a rate of 2.2-kg per 3.0-s with a speed of 20.9-m/s and is aimed at a toy car…

A: According to question we need to find--- What is the force exerted by the water on the toy car?

Q: A truck with a mass of 1780 kg and moving with a speed of 12.5 m/s rear-ends a 615 kg car stopped at…

A: Answer:-  Given  Mass of truck (M) = 1780 kg  Speed of truck (u) = 12.5 m/s  Mass of car (m) = 615…

Q: Two cars collide at an icy intersection and stick together afterward. The first car has a mass of…

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Q: You are driving a 1000 kg car in a race against a monster truck (10000 kg) and a clown car (300 kg).…

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Q: A 81.5 kg linebacker (X) is running at 6.35 m/s directly toward the sideline of a football field. He…

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Q: a 8 kg bowling ball, moving at 10 m/s to the right, hits and bounces off a second bowling ball with…

A: given that, mass of ball moving right (m1) = 8kg mass of ball moving left(m2) = 5kg  Initial…

Q: A 7900 kg truck traveling east at 5 m/s collides with a 1800 kg car traveling 300 south of west at…

A: According to the conservation of momentum, mtruckvEast+vNorth+mcar-vEast-vNorth=mtruck+mcarv7900 kg5…

Q: Jerome plays middle linebacker for Falls Church's varsity football team. In a game against Justice…

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Q: During a storm, rain comes straight down with an initial velocity of vi=-15 m/s and hits the roof of…

A: Solution - The force applied by a body that's travelling at a definite velocity (rate of speed) for…

Q: Two train cars on a frictionless track have a completely inelastic collision in which they "couple"…

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Q: Before collision, Car A and B were initially traveling Westward and Southward, respectively. The…

A: Given data: The final velocity of the two entangled cars is, V= 13.682 m/s The mass of car A is, mA=…

Q: In a laboratory experiment, a 0.200 kg glider and a 0.400 kg glider are pushed towards each other…

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Q: 1000 kg truck traveling 25 m/s northward collides inelastically with a 325 kg car traveling 30 m/s…

A: Mass of truck m1 = 1000 kg Velocity of truck v1 =  25 m/s  or    90 km/h      northward Mass of…

Q: 107.5-kg rugby player is initially running at 8.5 m/s in the positive direction, but collides…

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Q: An incoming tennis ball (mass 0.060 kg) has a speed of 14 m/s. The player hits the ball with a…

A: Given data:  Mass (m) = 0.060 kg Initial velocity (Vi) = 14 m/s Final velocity (Vf) = 30 m/s, in…

Q: help please  If a 10 kg bowling ball, moving at 8 m/s to the right, hits and bounces off a second…

A: Given, The mass of the ball, m1 = 10 kgmoving with speed, u1 = 8 ms   (rigjt)mass of the second…

Q: If a 1461 kg car, moving at 10 m/s north, hits and sticks to a 2639 kg truck, moving at 7 m/s east,…

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Q: The dark grey car below with a mass of 2575-kg ran into the back of a 825-kg compact car at rest.…

A: GivenMass of dark grey car ,M=2575 kgMass of compact car ,m=825 kgCompact car is at restAfter…

Q: ) An 1800 kg car traveling north at 45 km/hr collides with an 1100 kg car  traveling east at 55…

A: Mass and velocity of car 1 m1=1800 kg, v1=45 km/hr=12.5 m/s and mass and velocity of car 2 m2=1100…

Q: 30.) A railroad diesel engine coasting at 20 Km/h runs into a stationary flatcar. The diesel engine…

A: Given: The speed of the diesel engine is 20 km/h. The weight of the engine is 10000 N. The mass of…

Q: A completely inelastic collision occurs between two balls of wet putty that move directly toward…

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Q: Two blocks of masses m, = 4.00 kg and m, = 8.00 kg are each released from rest at a height of 5.00 m…

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Q: The stoplight had just changed and a 1,043 kg Cadillac had entered the intersection, heading north…

A: From conservation of momentum,  along y-axis, m1v1=m1+m2vfsinθ      .......(i) along x-axis,…

Q: Water leaves a hose at a rate of 3.6-kg per 2.5-s with a speed of 20.5-m/s and is aimed at a toy car…

A: Given Initial velocity is v0= 20.5 m/s Final velocity is v=3.1 m/s Time taken is t=2.5 s Mass is…

Q: Two cars collide at an icy intersection and stick together afterward. The first car has a mass of…

A: Given : m1 = 1200 kg v1y = -8.5 m/s (negative because of South direction) m2 = 550 kg v2x = -15 m/s…

Spring Potential Energy

The potential energy is the energy possessed by a body by virtue of its position or the energy held by the object due to its position relative to other objects, its force like stresses, charge, and other factors affecting the particles of the body. The potential energy is the measure of the net work done by or on the body. The spring potential energy is the potential energy stored due to the deformation of an elastic spring and this elasticity is due to the stretched spring. The elasticity is the ability of a solid-state matter to come back to its equilibrium position or original position after any kind of external force is acted on it. It is also known as Elastic potential energy. The potential energy here is caused due to the displacement of the spring from its equilibrium position to another position and this potential energy is equal to the net work done due to the stretching of the spring. It also resembles the same mechanics of the oscillation of a simple pendulum, where due to the external force, the object moves from its equilibrium position to its maximum ends and the periodic motion continues till it comes back to the equilibrium position to rest.