Disregarding friction, a roller coaster with a vertical drop of 46 m will achieve a speed of about 30 m/s. If the height of the drop is doubled, how much the speed is going to be?

Q: At the Earth’s surface, a projectile is launched straight up at a speed of 10.0 km/s. To what height…

A: Since given speed is very high, So we need to consider gravitational effects on the projectile too.…

Q: Along a straight horizontal track, a roller-coaster car is moving at 25 m/s. As shown in the figure…

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Q: A 1300-kg car moving on a horizontal surface has speed v = 65 km/h when it strikes a horizontal…

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Q: A 0.150kg glider slides on an ice pond with negligible friction with speed of 0.8 m/s. It has a…

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Q: An object of mass m=2kg starts from rest and moves down along an incline as shown in the figure…

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Q: The potential energy is dependent with height h from the surface of the earth while the kinetic…

A: The mathematical expression of potential energy is : PE = mgh Here, m is the mass of the object, g…

Q: A girl and her bicycle have a total mass of 42 kg. At the top of the hill her speed is 4.00 m/s. The…

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Q: A 2.1 × 103 -kg car starts from rest at the top of a 5.0-m-long driveway that is inclined at 20°…

A: Given data: Mass of car, m = 2.1 × 103 kg Length of driveway, L = 5 m  angle of inclination, θ = 20°…

Q: A 0.25-hp motor is used to lift a load at the rate of 5.0 cm/s. How great a load can it raise at…

A: Given: The power is 0.25 hp. The constant speed of the motor is 5 cm/s.

Q: What power on the cables does it require to lift a 250-kg elevator cab and 4 passengers each with a…

A:

Q: In scaling a vertical wall, spiderman needs 3.1 kW of power to maintain a speed of 4.5 m/s. If…

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Q: From what height would an automobile have to fall to gain the kinetic energy equivalent to what it…

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Q: A world-class sprinter running a 100 m dash was clocked at 5.4 m/s 1.0 s after starting running and…

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Q: A 2.5 kg crate falls from a height of 3.0 m onto an industrial spring constant of 2.5x10^5 N/m. At…

A: Mass of the crate (m)=2.5 kg Height of the crate above spring (h)=3 m Spring constant of the spring…

Q: A roller-coaster car is moving at 4.12 m/s along a straight horizontal track before entering the…

A: Given Data:- Speed of the car before entering the first drop is vA=4.12 m/s Height of the point A is…

Q: A cyclist coasts up a 12.1° slope, traveling 16.0 m along the road to the top of the hill. If the…

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Q: On the roller-coaster shown, a car is pulled up to point 1, where it is released from rest and moves…

A: Let H denote the height of point 1, h denote the height of point 4, m denote the mass of the…

Q: Say I lift a box from the ground straight up to 1m in 2s. If I lift the same box from the ground but…

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Q: A ski tow operates on a 15.0∘15.0 ^ {\circ }15.0∘ slope of length 300 m. The rope moves at 12.0 km/h…

A: Given: Slope θ=15o Length of rope L = 300 m. Velocity of rope v=12.0 km/h average mass per rider…

Q: "Tarzan, who weighs 650N, swings from a cliff at the end of a vine 24 m long. From the top of the…

A: The weighs =650N  To find does the vine brake

Q: A small block slides down a frictionless track whose shape is described by x>0, The value of d is…

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Q: A 54-kg ice skater pushes off the wall of the rink, giving herself an initial speed of 3.2m/s. She…

A: Write the expression for horizontal force using Newton’s second law

Q: At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at…

A: The law of energy conservation,

Q: A 1300-kg car moving on a horizontal surface has speed y = 50 km/h when it strikes a horizontal…

A: The kinetic energy will equal to the elastic potential energy. mv22=kx22

Q: a roller coaster track is in the shape of the parabola y= 80 -(x^2/20), where the lengths are in…

A: The vertical position causes the potential energy of the coaster car. Therefore, from conservation…

Q: A 100 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 200…

A: Given value--- mass = 100 kg. horizontal force = 200 N. first distance = 15 m. second distance = 15…

Q: A 5kg block was released from rest on top of a quarter circular surface. If the vertical height from…

A: Given data:  Initial velocity = 0 m/s Mass (m) = 5 kg Vertical height (h) = 4 m Acceleration due to…

Q: A skier leaves a ski jump at 15.0 m/s at some angle . At what speed is he traveling at his maximum…

A: Given :  Initial speed (vo) = 15.0 m/s Maximum height (hmax) = 4.50 m

Q: A water slide is constructed so that swimmers, starting from rest at the top of the slide, leave the…

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Q: Along a straight horizontal track, a roller-coaster car is moving at 25 m/s. As shown in the figure…

A:

Q: A man whose weight is 700 N takes 2.5 min for climbing up a staircase. What is the powerdeveloped in…

A: Work = force x distance Power is defined as the rate of doing work.

Q: The specialty of an athlete on the women's track team is the pole vault. She has a mass of 60 kg and…

A: Mass of the woman is m = 60 kg Approach speed is v1 = 8.7 m/s Her speed when she is directly above…

Q: How much energy is lost to a dissipative drag force if a 60-kg person falls at a constant speed for…

A: Energy is defined as capacity to do work. Whenever a body falls at a constant speed under the…

Q: If the height from the ground to point Y is 12.5 m, and the mass of the roller coaster car is 25kg.…

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Q: A.2.1x 10-kg.car starts from rest at the top of a 5.8-m-long driveway that is inclined at 15° with…

A: Given data: Mass of car (m) = 2.1×103 kg Displacement along driveway (d) = 5.8 m Angle with…

Q: Problem 1: A60.0 kg skier with an initial speed of 13 m's coasts up a 2.50 m high rise as shown in…

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Q: Suppose I need to  toss an object of mass 5.2 up onto a shelf 5.94 meters above where my hands can…

A: The third equation of motion is  v2 = u2 + 2 a s  where, u is the initial speed, v is the final…

Q: A film of Jesse Owens's famous long jump (Fig. 6–47) in the 1936 Olympics shows that his center of…

A: Given data: Speed at the top of the arc, v=6.5 m/s Height risen by centre of mass, h=1.1 m Let…

Q: At the time of throwing a ball up, it has acquired the kinetic energy of 30 J. To what height it…

A: According to energy conservation law, total energy imust reamin the same. At the initial point,…

Q: If an elevated object has a gravitational potential energy of 100J and all of sudden falls down to…

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Q: A 60.0 kg skier with an initial speed of 12.5 m/s coasts up a 2.50 m high rise as shown in the…

A: Given:Mass of the skier = 60 kgInitial speed of the skier = 12.5 m/sHeight of the ramp = 2.5…

Q: A 12 kg package in a mail sorting room is released with an initial speed of 3 m/s and slides a total…

A: Given information: Here, m is the package’s mass, vi is the package’s initial velocity, s is the…

Q: The engine of the car has a power of 355 hp. If it 800 kg and moves horizontally, what will be its…

A: Power of engine "P"= 355h.p = 264.72kW. mass of car "m"= 800 kg  time taken "t"= 7sec . initial…

Q: A parachutist weighing m=70Kg (including equipment) falls vertically from a height of 1500 meters…

A: Given data: The mass of parachutist is m=70 kg. The height from ground is h=1500 m. The time after…

Q: A block with mass m = 0.10 kg is released from rest at point y = 1.0 m and slides down along a…

A: Given Mass of block m = 01 kg height y = 1 m track is friction less

Q: A stone can slide down one of three different frictionless ramps, as shown in the figure. For which…

A: According to work energy theorem,   Work Done= Final kinetic energy- Initial kinetic energy But work…

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.