A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20 m/s2.a. What is the magnitude of the normal force of the elevator floor on the dog?A. 34 N            B. 43 N          C. 49 N            D. 55 N            E. 74 Nb. What is the magnitude of the force of the dog on the elevator floor?A. 4.2 N          B. 49 N            C. 55 N           D. 43 N             E. 74 N

Q: A 60 kg Gila monster on a merry-go-round is traveling in a circle with a radius of 3 m at a speed of…

A: Given data: Mass (m) = 60 kg Radius (r) = 3 m Speed (v) = 2 m/s Required: Centripetal acceleration,…

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Q: 1. A roller coaster car starts from rest at the top of a track 30.0 m long and inclined at 20.0° to…

A: Given: The length of the track is 30 m. The inclination of the track is 20°. Introduction: A body…

Q: Suppose you have a 120-kg wooden crate resting on a wood floor. (a) What maximum force can you exert…

A:

Q: (a) What is the weight of a 4.03 kg backpack? (b) What is the acceleration of the backpack if a net…

A: Given, Mass of backpack, m=4.03 kg Force applied,F=10 N

Q: Your forehead can withstand a force of about 6.0 kN before fracturing, while your cheekbone can only…

A:

Q: A 35.0-kg child takes a ride on a Ferris wheel that rotates four times each minute and has a…

A: (a) The centripetal acceleration of the body is,

Q: Suppose you have a 122-kg wooden crate resting on a wood floor. (μk = 0.3 and μs = 0.5)   a. What…

A:

Q: A lawn mower is pushed at a constant velocity of 0.76m/s. The person pushes horizontally forwards…

A: Given, v=0.76 m/sF=80 N

Q: A 49.05 N box is pulled from rest to the right by a horizontal force of 200 N . There is a…

A:

Q: In short-track speed skating, the track has straight sections and semicircles 16 m in diameter.…

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Q: H.W: Two blocks connected by a cord passing over a small frictionless pulley rest on frictionless…

A: According to Newton's second law Net force =mass×acceleration FBD of the block and the system:

Q: A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the driver steps on the…

A: Given: Car pushes = 1000 kg Truck pushes = 2000 kg Force = 4500 N

Q: A student’s backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an…

A: (a) (b)

Q: (I) A force of 35.0 N is required to start a 6.0-kg box moving across a horizontal concrete floor.…

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Q: A 600 N man stands on a bathroom scale in an elevator. As the elevator starts moving, the scale…

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Q: Zach, whose mass is 80 kg, is in an elevator descending at 10 m/s. The elevator takes 3.0 s to brake…

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Q: Suppose a 50.5 kg gymnast climbs a rope. (a) What is the tension (in N) in the rope if he climbs at…

A: Introduction: Newton’s laws of motion have wide range of applications. It can be applied to describe…

Q: ckey puck slides down a frictionless ramp with an acceleration of 5.00 m/s2. What angle does the…

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Q: The weight of an astronaut plus his space suit on the Moon is only 250 N. (a) How much does the…

A:

Q: A car with a mass of 1000.0 kg accelerates from 0 to 90.0 km/h in 10.0 s. (a) What is its…

A: a) We know ,    V=u+atgiven , V= 90km/h              = 90x1033600            = 25m/su=0t=10…

Q: (I) What is the weight of a 68-kg astronaut (a) on Earth, (b) on the Moon (g = 1.7 m/s²), (c) on…

A: Solution: Weight=Mass×gravity. Given: Mass of astronaut = 68 kg. (a) The gravity on the Earth is 9.8…

Q: B. how much tension must a cable withstand if it is used to accelerate a 120 kg car vertically…

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Q: An object has a mass of 100 kg. a) How much does it weigh on Earth? b) How much does it weigh on the…

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Q: Suppose you are flying in an airplane (7500 kg) at an altitude of 11km above the Earth's surface. a.…

A: ....

Q: A 110-kg fishing vessel travels Celebes Sea to catch variety of fish. But due to storm, the wind led…

A:

Q: d) A ball rolls off the edge of a cliff. The ball’s velocity is 27 m.s−1 just before it hits the…

A: Solution: Given that d). v=27 m/s e). F=2 N W = 7 N Ff = 3 N

Q: A. If F = 20 N, F = 40 N, F. = 100 N, ande = 70 degrees Whatis the net force along the y-axis? A.…

A:

Q: A parachutist has a mass of 70 kg. His parachute has a mass of 10 kg Watch eut dan thin all you have…

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Q: A rectangular box with a mass 23.7 kg initially at rest on a warehouse floor is acted on by a net…

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

A: Mass of the ice block (m)=32 kg Coefficient of static friction between ice block and the frozen lake…

Q: an astronaut on the moon places a package on a scale and finds its weight to be 25 N.  (a) What…

A: a. the acceleration due to gravity on the surface of the moon is 1.6 m/s^2.

Q: (d) If the rope connecting A and B were cut, what would be the acceleration of C? (Ans: 1.54 m/s²)

A:

Q: At the instant a race began, a 65-kg sprinter exerted a force of 720 N on the starting block at a…

A: a)Component of force in horizontal direction is,

Q: 100. mmh The speed of a bobsled is increasing because it has an accel- eration of 2.4 m/s². At a…

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Q: A 1000N cow is sitting in the grass. a. What is the cow’s mass? b. What is the cow’s weight? c. What…

A:

Q: high performance jet, mass 2450 kg, has twin jet engines. Each jet engine can develop 25 000 N of…

A: mass of jet (m) = 2450 kg Number of engines = 2 Thrust developed by each engine (T) = 25000 N

Q: A woman has a mass of 55.0 kg.a. What is her weight on earth?b. What are her mass and her weight on…

A:

Q: A 52 kg circus performer is to slide down a rope that will break if the tension exceeds 425 N. (a)…

A: a)

Q: A 2200 kg truck has put its front bumper against the rear bumper of a 2400 kg SUV to give it a push.…

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Q: (a) 1: Knowing that the forces values given as: F1=140 N, F2=260 N, F3=170 N, F4=55 N, 1)Determine…

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Q: What is the mass of m1? Given m2=2000kg and acceleration=1.0m/s2 (how is the answer for m1 2,500kg?)…

A:

Q: Zach, whose mass is 85 kg, is in an elevator descending at 12 m/s. The elevator takes 3 s to brake…

A:

Q: The weight of an astronaut plus his space suit on the Moon is only 350 N. (a) How much does the…

A: The acceleration of gravity on the moon is gmoon Acceleration of gravity on the earth is gearth…

Q: (a) What is the weight of a 4.00 kg backpack? (b) What is the acceleration of the backpack if a net…

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Q: A person who has a mass of 47 kg is standing in an elevator which is accelerating downward.…

A:

Q: An astronaut on the moon places a package on a scale and finds its weight to be 35 N. (a) What…

A:

Q: 3 A box is pushed as shown in the figure. by the man on the box be F. the friction force by the…

A: From the question it is given that F is the force exerted by man on box along the motion of its…

Q: Q3: A particle of mass m is projected vertically upward in a constant gravitational field with…

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