1) A rock is thrown vertically into the air. At the top of its path, it's acceleration is? A. greater than 9.8 m/s2 B. less than 9.8 m/s2 C. zero D. 9.8 m/s 2. A karate expert executes a swift blow and breaks a cement block with her bare hand. The force applied to her hand is?

Q: Q1: Calculate the force necessary to accelerate a 900-kg rocket vertically down at the rate of 30…

A: Given: Mass of the rocket,m=900 kg Acceleration, a=-30 m/s2 (negative sign indicates downward…

Q: 2. A 40-lb suitcase has an initial velocity down the ramp of va = 20 ft/s and the coefficient of…

A: in this  question  we use  equation of motion and free body diagram  equation.

Q: 6. A crate whose mass m is 250 kg rests on the bed of a truck that is moving at a speed v, of 100…

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Q: A body of mass 2.0 kg is moving along the x-axis with a speed of 3.0 m/s at the instant represented…

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Q: 5. Two mass A and B are at rest initially at the given positions. 0.4 m A t. 0,8 m B 0.9 m 1.1 m If…

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Q: Q3. The 100 kg log is pulled by a constant tension force of 1000 N from rest. Determine the velocity…

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Q: F1= - 10 N   30    For this problem, m=10 Kg. Please answer the following: A) What is the…

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Q: 1. A rocket is launched off the ground in which the foot pump produces 20 N [Right 60 Up] on the…

A: Since you have posted questions with multiple sub-parts, we will solve the first three for you. To…

Q: 5. (Two body problem) A boy is running at a constant velocity of 7.20 m/s [E] to catch a bus which…

A: The boy has constant velocity v=7.2 m/s and he is at a distance s=36m from the bus when it starts…

Q: Two children fight over a 200 g stuffed bear. The 25 kg boy pulls to the right with a 15 N force and…

A: Let m denote the mass of the bear, F1 denote the rightward force (take as positive direction), F­2…

Q: A 2540 kg test rocket is launched vertically from the launch pad. Its fuel (of negligible mass)…

A: According to the policy, only first three subparts will be answered here. Please post the rest…

Q: A 0.250-kg cart moves on a straight horizontal track. The graph of velocity, v, versus time, t, for…

A: given that, a 0.25 kg cart moves on a horizontal rack.

Q: A net force of 500 N gives an object an acceleration of 4.00 m/s². (a) what net force is needed to…

A: (a) First find the mass of the object m=Fa   =500 N4.00 ms2   =125 kg The force required to give the…

Q: A car given in Figure 1 has a mass of 1500 kg. It starts moving from rest with an accelera- tion of…

A: Given: m = 1500 kg; a1 = (0.5 t) m/sec2 a2 = -4 m/s2 u = 0 m/sec

Q: A horizontal rope is attached from a truck to a 1304-kg car. As the truck tows the car on a…

A: Maximum possible acceleration of the truck is  a = 2.06 m/s2

Q: During braking, a truck has a steady deceleration of 7.07.0 m/s22. A box sits on the platform of…

A: Scenario: Truck undergoes sudden deceleration due to action of brake as a result of this box sitting…

Q: 28º.) Calculate the minimum force F (in N) he must exert to get the block moving. What is its…

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Q: 200 n 400 n 30

A: Newton's second law of motion states that the acceleration of an object is directly proportional to…

Q: 1) A 3.15-kg block is acted on by a 24.0-N force that acts at 37.0° below the horizontal, as shown…

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Q: Q3. Determine the force in members CE, DE, and DF. 1 kN 2 kN 2 kN 2 kN 1 kN H 0.4m F D 2 m I C E G|…

A: Solution: to find the load in CE, DE and DF

Q: 8. If a 60 kg person on a 15 kg sled is pushed with a force of 300 N, what will be the person's…

A: Given data:  Mass of person (mperson ) = 60 kg Mass of the sled (msled ) = 15 kg Force (F) = 300 N…

Q: A strong boy throws a rock straight up with a force of 100 N. At what rate does the rock initially…

A: mass of the rock = m = 2 kg up ward force = F = 100 N Acceleration due to gravity = g = 9.74 m/s2…

Q: A model rocket is fired vertically from rest. It has a constant acceleration of 15.3 m/s^2 for the…

A: The force during the initial 1.5 sec is given by                                F=m*a…

Q: 1 A 120-lb person stands on a bathroom spring scale while riding in an elevator. If the eleva- tor…

A: Weight of a person is equal to 120 LB For part a elevator accelerated upward with acceleration  g/4…

Q: A 10-kg rock and a 20-kg rock are dròpped at the same time and experience no significant air…

A: Earth attracts every object with the same gravitational force of attraction and it is independent of…

Q: A dragster and driver together have mass 893.6 kg. The dragster, starting from rest, attains a speed…

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Q: A car of mass ?push=1200 kg is capable of a maximum acceleration of 4.00 m/s2. If this car is…

A: Given  Mass m=1200kg acceleration a=4m/s2 M=1500kg

Q: 1. (a) A 1200 kg car accelerates from 35 m/s to 10 m/s in 5.0 seconds. (i) What is the acceleration…

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Q: M = 2m We how have: Net force on m Net force on M ma = T – mg Ma = Mg – T Using these results from…

A: Given data :         Net force on m :       ma = T - mg    ---(1)        Net force on M :       Ma =…

Q: Q5: A machine part having a mass of 5 Kg slides along a rail aligned with the x- axis .Its position…

A: Mass of the machine part m=5 kg Position as a function of time x=18t2-3t3

Q: 3.) The driver of mass 80 kg is strapped to the seat of his Ferrari. If she comes to a stop after…

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Q: Q2. Two people each have a mass of 55 kg. They are both in an elevator that has a mass of 240 kg.…

A: Given data The mass of each people is mp = 55 kg The mass of the elevator is me = 240 kg The…

Q: Suppose a 66.5 kg gymnast climbs a rope. What is the tension in the rope if she climbs at a constant…

A: To determine,part a tension in the rope if she clibs with constant velocity(v).given,mass of…

Q: Problem 3: A boxer's fist and glove have a mass of m = 0.74 kg. The boxer's fist can obtain a speed…

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Q: 2. A body of mass m is thrown vertically upward into the air with an initial velocity vo. The body…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: the patio. He neglects to bend his knees on landing, taking 2.4 cm to stop. (a) What is his average…

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Q: 5. A rock of mass 45 kg accidentally breaks loose from the edge of a cliff and falls down. The…

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Q: A 60-kg man wishes to run on ice. The coefficient of static friction between his shoes and the ice…

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Q: A 70 kg man drops to a concrete patio from a window only 0.55 m above the patio. He neglects to bend…

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Q: 1. If the body starts from rest at A and slides 200 ft down the 30° incline, how far will it then…

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Q: 1.Which of the following is always true about net force? A. It causes motion. B. Its Sl unit is…

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Q: An object accelerates at 4m/s2 due to a 20N force applied to it. (a) What amount of force is needed…

A: Solution:- acceleration (a) = 4 m/s2  Force = 20 N  we know that the newton second law of motion…

Q: m2 15. The figure above shows two objects connected by a rope over a pulley. Assume the pulley is…

A: Given: Two object of masses m1=5 kg and m2=8 kg are connected by a rope over a frictionless and…

Q: 1. Martha is pulling a 2 kg box upward by a cord. The tension on the rope is 24 N. What is the…

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Q: A locomotive pulls 10 identical freight cars of mass m = 1.0 × 10° kg with an acceleration of a =…

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Q: 1. During a Washington Capitals hockey game, a player hits a 0.16 kg puck 18.0 m/s. 3A. If the…

A: Given:- The mass of the puck is 0.16 kg  The mass of the hokey player m =80 kg  The applied force F…

Q: 120 kg skater pushes against an 80 kg skater. After contact, the 80 kg skater was given an…

A: mass of first skater (m) = 120 kg mass of second skater (m') = 80 kg acceleration given to secon…

Q: A passenger in a car has a mass of 60.0 kg. The car accelerates forward at a rate of 4.75 m/sec2.…

A: Given :  Mass of the passenger, m = 60 kg

Q: 2. A rocket-powered hockey puck moves on a horizontal frictionless table. The figure shows the…

A: