A car going 19 m/s is brought to rest in a distance of 4 m as it strikes a pile of dirt.  How  large a force is exerted by the seatbelts on a 90 kg passenger as the car is stopped

Q: A 4.0-kg object is moving with speed 2.0 m/s. A 1.0-kg object is moving with speed 4.0 m/s. Both are…

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Q: An empty rollercoaster car has a mass of 3,000 kg and is released from rest at the top of a 40 m…

A: Given: The mass of the rollercoaster is 3000 kg. The height of the hill is 40 m.

Q: A block with a mass of 6.2 kg is being pushed along a surface over a period of 15 seconds. The…

A: Given data: The mass is m=6.2 kg. The time for the external work is required is t=6 sec to 15 sec.

Q: A car's bumper is designed to withstand a 4.68-km/h (1.3-m/s) collision with an immovable object…

A: Average force from Work done W=FavgdFavg=Wd=∆Ekd=12mv2f-v2id=12910 kg0-1.3 ms20.285 mFavg=2698 N

Q: You bring a small remote controlled boat with a mass of 2.2kg to a small pond to rest it out.…

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Q: A softball having a mass of 0.25kg is pitched at 82.8km/h. By the time it reaches the plate, it may…

A: In the given question, Mass of the softball (m) = 0.25kg Initial velocity of softball (u) = 82.8km/h…

Q: The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a…

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Q: The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a…

A: As the box slides from point A to point B the potential energy is converted into kinetic energy. The…

Q: A child on a sled is pushed on an icy road and is given a velocity of 3.60m/s. The child and the…

A: Initial velocity (u) = 3.60 msFinal velocity (v) = 0 msCombined mass = m coefficient of kinetic…

Q: A goft ball of mass 0.058 kg is hit off the tee at a speed of 25 m/s. The golf club was in contact…

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Q: A winch lifts a bag of sand of mass 12kg, from the ground with a constant force of 240 N until it…

A: (given) Mass of sand = 12 kg Constant force = 240 N Speed = 10 m/s Height = 40 m Equation of motion…

Q: 1000-kg car traveling at 70 m/s takes 3 m to stop under full braking. The same car under similar…

A: initial velocity(u)=70 m/s stopping distance(s)=3m final velocity(v)=0 finally stops let a be…

Q: A 1000-kg car is moving at 40.0 km/hr when the driver slams on the brakes and skids to a stop (with…

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Q: A car of mass 900 kg tows a caravan of mass 750 kg. There is a force of 1700 N opposing the motion…

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Q: Two go-karts are pushed from the same starting point with the same constant force. They are each…

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Q: A car's bumper is designed to withstand a 6.48-km/h (1.8-m/s) collision with an immovable object…

A: Given data: Initial speed of car, u=1.8 m/s Mass of the car, m=910 kg Collapsing distance, S=0.225 m…

Q: i need help with both of these questions

A: "We are sorry. As per guideline we are supposed to answer one question per session only."   Given:…

Q: light pallet is at rest on the ground with a stone of mass 30 allet by providing a force of 310 N…

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Q: A car going 13 m/s is brought to rest in a distance of 3 m as it strikes a pile of dirt. How large…

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Q: A 2000-kg car traveling at 21 m/s takes 51 m to stop under full braking.  The same car under similar…

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Q: A car's bumper is designed to withstand a 3.60 km/h (1.0 m/s) collision with an immovable object…

A: Given, Speed of the car, v = 3.60 km/h = 1.0 m/s mass of the car, m = 950 kg distance traveled, d =…

Q: Two blocks are released from the top of a building. One falls straight down while the other slides…

A: Here Two blocks released from the top of a building One block fall straight and another block move…

Q: A car's bumper is designed to withstand a 5.40-km/h (1.5-m/s) collision with an immovable object…

A: Given data-    Initial speed of the car Final speed of the car Mass of the car Distance covered by…

Q: A 300-Watt electric wheelchair has a mass of 50 kg and carries its 50 kg occupant at a constant…

A: Power = 300 watt Total mass, m= 50+50=100 Kg Height= 10 m

Q: An ice skater at rest catches a bag of sand moving to the north with a speed of 5.4 m/s. This causes…

A: Given, Mass of skater(M) = 63 kgInitial speed of skater (us) = 0Final speed of skater (vs) =…

Q: A car’s bumper is designed to withstand a 4.0-km/h (1.1-m/s) collision with an immovable object…

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Q: A 500 g cart is released from rest 1.00 m from the bottom of a frictionless, 30.0∘ ramp. The cart…

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Q: Two boxes of different mass are at rest. If both boxes are acted upon by equal force, which of the…

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Q: of a mass of 2.5-kg is launched upwards, with an initial speed of 39 m/s. How fast is the object…

A: GivenMass of object, m=2.5 kgInitial speed of object vertically upward, u=39 m/s

Q: A 1200 kg car and a 2400 kg car are lifted to the same height at a constant speed in a auto service…

A: Givenm1 = 1200 kgm2 = 2400 kgh1 =h2 = h (say)

Q: A car's bumper is designed to withstand a 4.32 km/h (1.2 m/s) collision with an immovable object…

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Q: A 4.0-kg object is moving with a speed of 5.0 m/s, and a 5.0-kg object is moving with a speed of 4.0…

A: Given quantities: mass of object 1 (m) = 4 kg , mass of object 2 (M) = 5 kg velocity of object 1 (v)…

Q: A 4.4-g bullet leaves the muzzle of a rifle with a speed of 336 m/s. What force (assumed constant)…

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Q: A mass m is placed at a height of h from the ground on a wedge . ( u coefficent of friction = 0 for…

A: Mass = m Height = h Distance traveled on the ground, x = 20 m Coefficient of friction between the…

Q: At the base of a hill, a 90 kg cart drives at 13 m/s toward it then lifts off the accelerator…

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Q: A car of mass m slides across a patch of ice at a speed v with its brakes locked. It the hits dry…

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Q: A baseball (m=145g)(m=145g) traveling 40 m/sm/s moves a fielder's glove backward 27 cmcm when the…

A: It is given that

Q: The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a…

A: Given data The mass of the first block is m1 = 13 kg The mass of the second block is m2 = 37 kg The…

Q: A child and sled with a combined mass of 52.0 kg slide down a frictionless slope. If the sled starts…

A: Given data Mass of the combined system, m=52 kg Initial speed of the system, u=0 m/s Final speed,…

Q: A 4.0-kg object is moving at speed 2.0m/s. A 1.0kg object is also moving with a speed of 2.0 m/s.…

A: The net force on the object is, F=maa=Fm The kinematic equation can be given as,…

Q: A 0.60-kg block Initially at rest on a frictionless horizontal surface is acted upon by a force of…

A: Mass = 0.60 kg  Force = 7N Distance =5.5 m

Q: A baseball (m=145g) traveling 32 m/s moves a fielder's glove backward 26 cm when the ball is caught.…

A: The base ball’s  kinetic energy is converted into its work done

Q: What are the speeds of the two logs and of the lumberjack after she has stopped on the second log

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Q: Sam is shooting a 10 kg rock using a catapult. The posts are 2 m apart and have an unstretched…

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Q: A ball of mass 0.300 kg is thrown upward, rising 10.0 m above the point at which it was released.…

A: A ball of mass M = 0.300 kg is thrown upward, rising h = 10.0 m above the point at which it was…

Q: Two go-karts are pushed from the same starting point with the same constant force. They are each…

A: Work and conservation of energy: Equation for work is W = F ×d or the work is equal to the force…

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.