A body of mass 4 kg is projected upward with an initial velocity of 30 m/s. The air resistance is 0.01v N where v is in m/s. How long (in seconds) does the body reaches the maximum height? (Use four decimal places) Group of answer choices 2.9468 s 1.9468 s 4.7581 s 3.7218 s

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

A:

Q: What is the maximum velocity at which a 25 W motor can lift an 8.5 kg object upward

A: Given that:- P=25 Wm=8.5 kgg=9.8 m/s2V=?   Since, P=mgV

Q: A single force of F(t) = 3t + 6 acts on a box that is initially stationary on a frictionless…

A: c. 12.0 m/s is the correct answer

Q: A 6.4 kg block of wood resting on a platform was hit by a 48 g bullet travelling upward with a speed…

A: Given: M=6.4 kgm=48g=0.048 kgubullet=1124 m/sublock=0 m/svbullet=691 m/s

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

A:

Q: A 5.0-kg rock is dropped, initially at rest, from a 6.0- m-high second story window. What will be…

A: Given data: Mass (m) = 5.0 kg Initial velocity (v0) = 0 m/s Height (h) = 6.0 m Required: The kinetic…

Q: An 80 kg object is dropped from rest from a height of  25 meters above the ground. Use the concept…

A:

Q: A 5 kg block slides on a surface with friction (mu = 0.1). If the initial KE is 50 J, how far does…

A:

Q: A 60.0 kg skier with an initial speed of 15 m/s coasts up a 2.50 m high rise as shown in the figure.…

A: Given data- Mass of skier =60 kg Initial speed vi=15 m/s Height h=2.50 m Coefficient of kinetic…

Q: If a 3.15 kg object is placed on a frictionless incline of 70.5 º and released from rest, what is…

A: Given, mass of the object, m = 3.15 kg angle of inclination of the plane, θ = 70.5° initially the…

Q: 60 kg skier skis without friction down a slope which is 100 m high and along a path thag is 200m…

A: Given: The mass of the object is 60 kg. The height of the object from the ground is 100 m. The path…

Q: Coal is lifted out of a mine a vertical distance of 61 m by an engine that supplies 655 W to a…

A:

Q: 1. A crane released a block of mass m 5.0 kg from a height h of 2.0 m towards a spring with spring…

A:

Q: 4. A 10 kg block slides down a hill that is 200 meters tall with an initial speed of 12 m/s. What is…

A:

Q: From the diagram above, what is the velocity of the block when it reaches point B? (Neglect wind…

A: Given initial height h1 = 9.00m Initial velocity  v1 = 5 m/s Height at point B h2 = 5.00 m Mass of…

Q: A 60.0 kg skier starts from rest at the top of a ski slope 65.0 m high. Now moving horizontally, the…

A: Given: Mass of the skier is 60 kg. Height of the snow peak is 65 m. Co-efficient of kinetic friction…

Q: 9. What is the velocity of a 5000 kg truck whose KE is 360 kJ? Group of answer choices 31 m/s 144…

A: Given value--- mass = 5000 kg. Kinetic energy = 360 kJ. We have to find--- velocity?

Q: A lawn roller is pushed 15 meters by a force of 100 N. If the person has used 85 W, how long did it…

A:

Q: The 1.1 kgkg physics book in figure is connected by a string to a 550 gg coffee cup. The book is…

A:

Q: A projectile of mass 0.719 kg is shot straight up with an initial speed of 22.1 m/s. (a) How high…

A: Mass (m) = 0.719 kg Initial speed (u) = 22.1 ms

Q: The electric motor of a model train accelerates the train from rest to 0.640 m/s in 16.0 ms. The…

A:

Q: The 69.5-kg swimmer in the figure starts a race with an initial velocity of 1.3 m/s and exerts an…

A: Given Information:- Mass of the swimmer is m=69.5 kg Initial velocity of the swimmer is vi=1.3 m/s…

Q: A stone of mass 80 g is dropped onto an unstrained vertical spring with a spring constant k = 0.8…

A:

Q: A 62.0 kg skier is moving at 6.90 m/s on a frictionless, horizontal, snow-covered plateau when she…

A:

Q: A 30 kg box has an initial velocity of 10 m/s to the right. A person applies a force of 300 N to the…

A:

Q: A boy hits a 0.05-kg golf ball from rest, giving it a speed of 75 m/sec. If the club was in contact…

A: Given that the mass of the ball and final and initial velocity. Then We have to determine the value…

Q: The electric motor of a model train accelerates the train from rest to 0.680 m/s in 15.0 ms. The…

A: As per the given data, Mass of the motor (m) = 830 g = 830×10-3 kg; Initial velocity (u) = 0 (rest);…

Q: A 93 kg man lying on a surface of negligible friction shoves a 56 g stone away from himself, giving…

A: Using the conservation of momentum we get M1 V1 = M2 V2 Where M1,V1 are the mass and velocity of…

Q: 9.7 kg block of wood resting on a platform was hit by a 31 g of bullet travelling upward with a…

A:

Q: As a block of mass 7 kilograms drops from the edge of a 40-meter-high cliff it experiences a loss of…

A: Given: The mass of the block is 7 kg. The height of the cliff is 40 m. The loss of energy due to air…

Q: 1. A crane released a block of mass m 5.0 kg from a height h of 2.0 m towards a spring with spring…

A: Given: mass of block, m = 5.0 kg  spring constant, k = 85 N/m  Air resistance, Fr = 30 N  height of…

Q: About 80 g of blood is pumped from the heart during each heartbeat. The blood starts at rest and has…

A: Given:-  mass of blood =80 g=0.08 kg  initial velocity of blood (u)=0  final velocity of blood is…

Q: The 1.1 kgkg physics book in figure is connected by a string to a 550 gg coffee cup. The book is…

A:

Q: During the Powerhouse lab, Jerome runs up the stairs, elevating his 102 kg body a vertical distance…

A: The mass, m=102 kg   The vertical distance, h=2.29 m   The time duration, t=1.32 s

Q: A 75 kg fisherman in a 135 kg boat throws a pile of 0.80 kg rocks towards the shore. If he throws…

A: mass of pile of rocks = 0.8 kg mass of fisherman = 75 kg mass of boat = 135 kg average force = 5 N…

Q: A 4.0 g bullet leaves the muzzle of a riffle with a speed of 328 m/s. What force (assumed constant)…

A:

Q: weighing 120 pounds strikes the concrete wall of a fort in a velocity of 1500ft/s. the projectile…

A: Given mass m = 120 pound = 120 ×0.453 = 54.36 kg  Initial velocity = 1500 ft/s = 1500 × 0.3 = 450…

Q: A block with a mass m is moving on a frictionless horizontal surface with a speed of V 10 m/s. The…

A: The block of mass m will momentarily be moving with the same velocity as that of mass M when the…

Q: 1. A crane released a block of mass m 5.0 kg from a height h of 2.0 m towards a spring with spring…

A: Basic Details According to the conservation of energy, the initial energy of the system is equal to…

Q: A 12.5 kg box sits on a shelf that is 1.8 m high. If it is dropped, how fast will it be going just…

A: Given Mass of the box is m=12.5 kg Height of the shelf is h=1.8 m   We have to find the speed of the…

Q: Q (): Ifa 3 kg ball is thrown straight up into the air with initial speed of 25 m/s, the kinetic pne…

A:

Q: An outfielder throws a 0.148 kg baseball with velocity 30 m/s at 25° above horizontal. Ignoring air…

A: Given data: Mass (m) = 0.148 kg Initial velocity (V0) = 30 m/s Angle (θ) = 25°, above the horizontal…

Q: A ball of mass m= 0.38 kg is tied to a massless string of length L=1.2m. The ball is released at…

A:

Q: A 0.45 kg box approaches the ramp at an unknown velocity. It travels up the 0.04 meters high ramp…

A:

Q: Ignoring the resistances including air what will be the speed of the projectile when it touches the…

A: Given Mass of projectile = 12 g Initial speed of projectile = 1500 m/s We have to find the speed of…

Q: A single frictionless roller-coaster car of mass m= 200 kg tops the first hill with speed vo = 16.0…

A: mass, m = 200 kg  velocity at A, v = 16 m/s  Height at A, h = 60 m Height at B, h'= h/2 = 30 m

Q: A 60.0 kg skier with an initial speed of 13 m/s coasts up a 2.50 m high rise as shown in the figure.…

A: Write an expression using Newton’s second law of motion along the incline

Q: A baseball is thrown vertically upward with an initial velocity of 9 m/s. Neglecting air friction,…

A: Initial vertical upward velocity of baseball (u) = 9 m/sto find : speed of baseball when it gets…

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…

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.