A 2.00-kg (20.0-N) stone is dropped from a height of 5.0 m, and strikes the ground with a velocity of 8.00 m/s. As the stone falls, it is acted on by force from air friction. What is the average force that air friction exerted on the stone? A. 1.6 N B. 3.2 N

Q: 357 kg car is moving at 35–. The driver then accelerates at 3.5 for 18.3s s2 a. How fast is the car…

A: given   m=1857 kg      initial velocity u=35 m/s      acceleration a= 3.5 m/s2     t=18.3 s v = u…

Q: 2. A nonzero net force acts on an object. Which of the following quantities could be constant?…

A: When a nonzero force acts on body, the body gets an acceleration. When a body has acceleration this…

Q: Part A A7600-kg railroad car travels alone on a level frictionless track with a constant speed of…

A:

Q: A .22 rifle bullet, traveling at 350 m/s, strikes a large tree, which penetrates to a depth of 0.130…

A: Given: The initial speed of the bullet is 350 m/s. The mass of the bullet is 1.8 g. The stopping…

Q: 12. An 80.0 kg stuntman jumps out of a window that is 45 m above the ground. a. How fast is he…

A:

Q: 5. A 55 kg skater is moving at 15msin the (−ˆy) direction on a frictionless rink throws a 3 kg ball…

A:

Q: 1. Carol, who is 60 kg, is driving her çar at a speed of 25 m/s. She sees a dog crossing the road…

A:

Q: 1. A person with a black belt in karate has a fist that has a mass of 0.70 kg. Starting from rest,…

A:

Q: When a golf ball is dropped to the pavement, it bounces back up. (a) Is a force needed to make it…

A: A golf ball

Q: A 200 kgkg weather rocket is loaded with 100 kgkg of fuel and fired straight up. It accelerates…

A: Acceleration , a = 35 m/s2  Time , t = 32 s To find = rocket's maximum altitude

Q: A 3.00-kg object is initially moving northward at 15.0 m/s. Then a force of 15.0 N, towards the…

A:

Q: A rope hangs down from a high tree branch at the edge of a river. Josh, who has mass 65 kg, trots at…

A: Given values, mass of josh, m =65 Kg Length of rope, L =7.2 m velocity of josh, v =2.5 m/s

Q: 3. A sunfish sailboat is a small sailboat, typically used for one or two people. The mass of the…

A: a = 2m/s2 Mass of boat = 60 Kg  Mass of person = 70 Kg

Q: A 1100 kg car traveling at 27 m/s starts to decelerate and comes to a complete stop in 578.0 m. What…

A:

Q: A 100 kg go-kart travels at a velocity 2 m/s and then quickly stops in 8 seconds to avoid an…

A: Here, a=∆v∆t=0m/s-2m/s8s=-0.25m/s2

Q: A 2 000-kg car is slowed down uniformly from 20.0 m/s to 5.00 m/s in 4.00 s. (a) What average force…

A: The mass of a car is, m=2000 kg The initial velocity of a car is, u=20 m/s The final velocity of a…

Q: 1. A cart of mass 4.2 kg is moving at a velocity of 2.7 m/s but then the force shown in the graph…

A: Given: Mass, m = 4.2 kg Initial velocity , u = 2.7 m/s

Q: A light block of mass m and a heavy block of mass M are attached to the ends of a rope. A student…

A:

Q: hits the ground? 3) [Horizontal-ish] The position of a 12 kg mass can be described as a function of…

A:

Q: Dolphins and other sea creatures can leap to great heights by swimming straight up and exiting the…

A: When the dolphin is moving in water, it is given that,

Q: Q9. An object (4.0 kg) is moving on a frictionless surface at a constant velocity (4 m/s), how mi…

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Q: (b) Evaluate the support reactions forces of the loading diagram shown in Figure Q5(b) 60KN 40KN D…

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Q: A 60 kg object traveling at a speed of 80 m/s is suddenly brought to rest in a time of 0.4 seconds.…

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Q: 1. A large semi truck has a mass of 35,000 kg. It collides head on with a car that has a mass of…

A:

Q: (II) A baseball (m fielder's glove backward 25 cm when the ball is caught. What was the average…

A: Given data:  Mass (m) = 145 g = 0.145 kg Initial Velocity (v) = 32 m/s Final velocity = 0 m/s…

Q: rifle bullet, traveling at 426 m/s strikes a large tree, which it penetrates to a depth of 0.130 m.…

A: Given m = 1.8 g = 1.8 × 10-3 kg Initial velocity u = 426 m/s Final velocity v = 0

Q: 75. Review Conceptual Example 16 as background for this problem. The water skier there has a mass of…

A: Given data: Mass of the water skier, m=73 kg

Q: 8. Carol, who weighs 60 kg, is driving her car at a speed of 25 m/s. She sees a dog crossing the…

A:

Q: Squid use jet propulsion for rapid escapes. A squid pulls water into its body and then rapidly…

A: Given: Mass of the squid = 1.5 Kg Acceleration = 20 m/s2 Amount of water ejected = 0.15 Kg

Q: Keith Lee, who is billed at 154 kg, ejects Adam Cole, billed at 95 kg, from frame. Assuming Cole…

A: Given data The mass of Keith lee is given as mk = 154 kg. The mass of adam cole is given as ma = 95…

Q: A 2.50-kg fireworks shell is fired straight up from a mortar and reaches a height of 110.0 m. (a)…

A:

Q: Starting from a standstill, Abi (mass = 55.00 kg) performs a vertical jump. a.) How much does Abi…

A: Mass of Abi is m = 55.00 kg

Q: A 0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t = 0, the puck is…

A: Given that, Mass of hockey = 0.160 kg Initial velocity = 3.00 m/s (a). Force = 25.0 N  Time = 0.050…

Q: Q2. A fisherman in a boat catches a great white shark with a harpoon. The shark struggles for a…

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Q: An 50kg volleyball player lands from a jump and tries to stop her forward motion. The normal contact…

A:

Q: A 50

A: Given values, Net force(F)=50N  Mass of object=20kg  Initial Velocity(u)=10m/sTime(t)=8sec

Q: When starting a foot race, a 70.0-kg sprinter exerts an average force of 650 N backward on the…

A: Given Data: The mass of sprinter is, m=70 kg The force exerted by the sprinter is, F=650 N The time…

Q: 6. A block of ice with mass 4.00 kg is initially at rest on a frictionless, horizontal surface. A…

A: Mass of ice block, m=4 kg Position of block, x(t)=αt2+βt3, where α=0.150 m/s2     and…

Q: A crate pushed along the floor with velocity ν→i slides a distance d after the pushing force is…

A: Given data A crate pushed along the floor with velocity vi→. The crate slides a distance of d after…

Q: A 149-g baseball is dropped from a tree 15.0 m above the ground. a) With what speed would it hit…

A: M = 150g = 0.15kg H = 15.0m Initial velocity, u = 0 Acceleration, g = 10m/s2

Q: Q4. An 80 kg stuntman jumps out of a window that is 45 m above the ground. (a) How fast is he…

A:

Q: (a) What is the ratio of the kinetic energy after the collision to the kinetic energy before the…

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Q: A 3500 g fireworks shell is ffired straight up from a mortar and reaches a height of 210.0 m. (a)…

A: Given that, The mass of fireworks, m = 3500 g = 3.5 kg It reaches the height of 210 m (a) Let v is…

Q: 2. A glass beer mug has a mass of 1.3 kg when empty. You fill the glass with 0.7 kg of beer and…

A:

Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: