A teenager is pushing a cart.  There is no friction between the cart and the ground. Mass of the cart is 120 kg. Cart is initially at rest (at time = 0 s). Direction to the right is positive. A. He pushed the cart for 5 s (from t = 0 s to t = 5 s) with a force of 75 N to the right hand side. B. Then he stopped pushing for 5 s (from t = 5 s to t = 10 s).  C. Then he pushed the cart for 10 s (from t = 10 s to t = 20 s) with a force of 75 N to the left hand side.  Questions: 1. Calculate the acceleration of the cart at t = 2 s   2. Calculate the velocity of the cart at t = 5 s.   3. Calculate the velocity of the cart at t = 10 s.

Q: A hammer of mass m = 0.465 kg is moving horizontally at a velocity of v = 5.5 m/s when it strikes a…

A: The hammer will be in contact with nail until it drives the nail to a distance of 1.15 cm. After…

Q: C A Three boxes, each of mass 22 kg are on a frictionless table, connected by massless strings. A…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: What is the magnitude of the average force, in newtons on a 0.022 kg bullet to accelerate it to…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: The speed of a bobsled is increasing, because it has an acceleration of 3.42 m/s2. At a given…

A: Given :      The acceleration of the bobsled, a=3.42 m/s2       Net forces resisting the motion, fR…

Q: The average speed of a nitrogen molecule in air is about 6.7 x 10^2 m/s, and its mass is 4.68 x…

A:

Q: Part A In the figure (Figure 1), if mA =1.40 kg, mB = 1.20 kg and θ=33.0 ∘, what will be the…

A:

Q: ) In the figure (Figure 1) , if mA =1.50 kg , mB = 1.40 kg and θ=34.0 ∘, what will be the magnitude…

A: Given data: The mass of block A is mA = 1.50 kg. The mass of block B is mB = 1.40 kg. The inclined…

Q: A “sun yacht” is a spacecraft with a large sail that is pushed by sunlight. Although such a push is…

A: the parameters given are: mass = 900kg force = 20N

Q: a) A dockworker applies a constant horizontal force of 65.0N to a block of ice on a smooth…

A:

Q: Two blocks connected by a cord passing over a small, frictionless pulley rests on frictionless…

A:

Q: The graph in the figure shows the x component of the acceleration of a 2.4-kg object as a function…

A: Given Data: The mass of an object is, m=2.4 kg   The expression for Newton's second law is given as,…

Q: A shopper in a supermarket pushes a loaded cart with a horizontal force of 10 N. The cart has a mass…

A: Given: Force  by cart, F1=10 N Mass of cart, M=30 kg Time taken, t=3 s Force by child, F2=30 N…

Q: Two teams of nine members each engage in tug-of war. Each of the first team's members has an average…

A: Given The average force on the right is F1=1450 N. The average force on the left is F2=1635 N. The…

Q: An ice cube with a mass of 0.0540 kg is placed at the midpoint of a 1.00-m-long wooden board that is…

A: Given:  Mass of ice block, m = 0.054 kg  Length of plank, L = 1 m  Distance covered, s = L/2 = 0.5 m…

Q: B-A man of mass M = 80.0 kg and woman of mass m = 54.0 kg stand facing each other on an ice rink,…

A: Given: Force F=80 N Drawing free body diagram of Man and Woman                            Women…

Q: A spacecraft that is initially at rest turns on its engine at t=0. If its mass is 3000 kg and the…

A:

Q: A football punter accelerates a football from rest to a speed of 11 m/s during the time in which his…

A: The expression to determine the acceleration of the ball is, a=∆v∆ta=11m/s0.14sa=78.57m/s

Q: A man of mass M-77 kg and woman of mass m =64 kg stand facing each other on an ice area, both…

A: Given:- The mass of the man = 77 kg  The mass of the woman = 64 kg  The woman pushes  the man with a…

Q: Assume that there are no frictional forces between the pulleys and the strings, and the strings are…

A: a)   free-body diagrams for each mass :

Q: The average speed of a nitrogen molecule in air is about 6.70 x 102 m/s, and its mass is 4.68 3…

A:

Q: A car of mass 872 kg is traveling 28.9 m/s when the driver applies the brakes, which lock the…

A: Given data:  Mass (m) = 872 kg Initial velocity (V0) = 28.9 m/s, positive x direction  Time (t) =…

Q: Two teams of nine members each engage in tug-of-war. Each of the first team’s members has an average…

A: Given Data: The average mass of the first-team member is, m1=68 kg The average force of the…

Q: A toy wagon is on a straight, horizontal track and has a fan attached to one end. The wagon is…

A: Given: m1=355 gs1=1.5 mt1=4.55 sm2=722 gs2=1.5 m To find: a). What is the net force exerted on the…

Q: What force is required to slow a 1250-kg car traveling 115 km/h to 30.0 km/h within 3.50 s? (a) How…

A: Given data The mass of the car is: m = 1250 kg The initial speed of the car is: u = 115 km/h =…

Q: A hammer of mass m = 0.45 kg is moving horizontally at a velocity of v = 5.5 m/s when it strikes a…

A:

Q: Three forces acting on an object are given by  F1 = (−1.65î + 7.10ĵ) N, F2 = (4.60î − 2.1ĵ) N,  and…

A: Hint(*)  acceleration = F→m = a→F→ = F1→+ F2→ +F3→(*) direction a^ =a→a→(*) m = F→a→(*) v→ =u→ +a→t…

Q: A 500 g model rocket accelerates from 20 m/s [up] to 45 m/s [up] in 0.70 s. A) What is the net force…

A:

Q: a) A dockworker applies a constant horizontal force of 65.0N to a block of ice on a smooth…

A:

Q: The average speed of a nitrogen molecule in air is about 6.70∗10 2 m/s, and its mass is 4.68∗10 -26…

A:

Q: a) A dockworker applies a constant horizontal force of 80.0N to a block of ice on a smooth…

A:

Q: A rocket moving in space, far from all other objects, has a speed of 3.0 x 103 m/s relative to the…

A:

Q: Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. If the engine…

A:

Q: A small engine causes a 0.20-kg model airplane to accelerate at a rate of 12 m/s2 . What is the net…

A: Mass M = 0.20 kg Acceleration a = 12 m/s2

Q: A pickup truck with mass of 1230 kg moving at 105 km/h stops within a distance of 53.0 m. (a) What…

A:

Q: A pickup truck with a mass of 980 kg is initially at rest. The truck accelerates to a speed of 95…

A: A)

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 brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a…

A: Given, Force, F= 800 N, Mass of losing player, Ml=90 kg, acceleration, al=-1.20 m/s, and mass of…

Q: A hammer of mass m = 0.465 kg is moving horizontally at a velocity of v = 4.5 m/s when it strikes a…

A:

Q: The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously…

A:

Q: A car of mass 972 kg is traveling 24.4 m/s when the driver applies the brakes, which lock the…

A: Given Data mass of the car = 972 kg initial velocity,vi = 24.4 m/s final velocity,vf = 0m/s time,t =…