onstant force of friction opposing your push of 75.0 N. As you push the box, it accelerates from rest to a speed of 2.50 m/s in 15.0 seconds. (a) What is the force of your push, in Newtons? (b) Suppose the box had a mass of 25.0 kg, and you pushed in with the same for that you found in part (a). What would the acceleration of the box be? How long would it take to reach a speed of 2.50 m/s, starting from rest?

Q: A person is pushing a box of mass 5 kg horizontally across a floor using a constant force of 13 N.…

A: F-Ffriction=maa=F-Ffrictionm=13 N-3 N5 kg=2 m/s2

Q: Two cables are pulling on a box, sliding it across the (frictionless) floor.  One cable pulls to the…

A:

Q: onsider a person standing on a scale in an elevator. If the elevator accelerates upwards with an…

A: Write the given values with the suitable variables. a=1.21 m/s2m=102.9 kg Here, a is the…

Q: A hand pushes two blocks across a frictionless pond of ice. Block A has a mass of 1 kg and block B…

A: Force, F = 15 N  mass of A, mA = 1 kg  mass of B, mB = 4 kg

Q: A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.9 m/s2. (a) If…

A:

Q: Cynthia pulls horizontally on an old chest of drawers (m = 75.0 kg), sliding it across the floor.…

A: Given data: The mass of the chest of drawers is m=75.0 kg. The force of pull applied by Cynthia is…

Q: A freight train has a mass of 1.2 ✕ 107 kg. If the locomotive can exert a constant pull of 6.9 ✕ 105…

A: freight train has a mass = 1.2 ✕ 107 kg vi = 0 m/s vf = 70 km/h = 19.44 m/s F(locomotive) = F(pull)…

Q: Mary applies a force of 78 N to push a box with an acceleration of 0.54 m/s2. When she increases the…

A:

Q: In an experiment, a student exerts a force of 18.0 N on a 8.75 kg oak block to keep it moving at a…

A:

Q: A 44-kg box rests on the floor. The coefficients of static and kinetic friction between the bottom…

A:

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 55-kg box rests on a horizontal surface. A force of 300.0 N is pulling the box toward the right…

A:

Q: A woman of mass 58.4 kg is standing in an elevator. If the elevator floor pushes up on her feet…

A:

Q: Suppose two children push horizontally, but in exactly opposite directions, on a third child in a…

A: The first child exerts a force of 71 NThe second force is 98 NKinetic friction is 4.5 NMass of the…

Q: You look up the car on Kelly’s Blue Book and find the mass to be 1200 kg.   You go and push the car.…

A: Coefficient of static friction between dry concrete and rubber = 1 Coefficient of kinetic friction…

Q: A horizontal force of 608 N is needed to overcome the force of static friction between a level floor…

A: Horizontal force applied (F) = 608 N  Mass of crate (M) = 225 kg  Coefficient of kinetic friction =…

Q: Suppose two children push horizontally, but in exactly opposite directions, on a third child in a…

A: The expression for the Newton’s second law of motion in horizontal direction is,

Q: Mary applies a force of 78 N to push a box with an acceleration of 0.49 m/s2. When she increases the…

A: The applied force in first case is 78 N and acceleration is 0.49 m/s2. The applied force in second…

Q: A horizontal force of magnitude F = 57.5 N pushes on a block of mass m = 4.7 kg. The block is on a…

A: The given situation can be represented as

Q: Two squirrels are fighting over a nut that has a mass of 0.12 kg.  One squirrel pulls to the left…

A: The mass of the nut, m=0.12 kg   The force 1, F→1=-5.0 N   The force 2, F→2=3.5 N

Q: A soccer player starts from rest and accelerates forward, reaching a velocity of 9.00 m/s in 3.00 s.…

A: The equation of motion is, v = u + at9m/s =0+a3.0sa=3m/s2

Q: A powerful motorcycle can produce an acceleration of 3.50 m/s while traveling at 90.0 km/h. At that…

A:

Q: A train locomotive pulls a train with a mass of 1.40 ✕ 107 kg on level rails. The locomotive exerts…

A:

Q: An elevator, moving upward, decreases in speed from 8.41 m/s to 1.70 m/s in 2.02 s. Assuming…

A:

Q: horizontal force

A: To maintain the motion of the box at a constant speed, the worker must apply a horizontal force…

Q: A falling ball of mass 0.5 kg experiences a downward force due to gravity of mg (where g = 9.8 m/s2)…

A:

Q: A horizontal force of magnitude F = 56.2 N pushes on a block of mass m = 5.87 kg. The block is on a…

A: The objective of the question is to find the acceleration of the block on the incline in terms of…

Q: A 2 kg block is pulled on by a rope with a tension force of 20 N. The coefficient of kinetic…

A:

Q: A jet aircraft with a mass of 4,375 kg has an engine that exerts a force (thrust) equal to 60,400 N.…

A: a) 13.80 m/sec² b) 69 m/sec c) 172.5 m

Q: You find an abandoned car in a Walmart parking lot. The car is locked.  You look up the car on…

A:

Q: A 1250 kg boat is traveling at 90 km/h when its engine is shut off. The magnitude of the frictional…

A: Using Newton’s second law of motion,

Q: Mary applies a force of 78 N to push a box with an acceleration of 0.49 m/s2. When she increases the…

A: Draw the free-body diagram of the system.

Q: A box lies on a frictionless table. A force of 19.5 Newtons pulls the box to the right, while a…

A:

Q: An object of mass 13.0-kg subjected to a non-zero net force moves with an acceleration of (8.00î –…

A:

Q: Mary applies a force of 71 N to push a box with an acceleration of 0.45 m/s2. When she increases the…

A:

Q: You drop an object of mass m from a tall building. Suppose the only forces affecting its motion are…

A:

Q: Two toy wagons are tied together with ropes. Rope B is being pulled with a force of 25 N. The mass…

A: The objective of this question is to find the acceleration of the two wagons and the tension in each…

Q: A child is pulling a red wagon full of toys (total mass is 8.15 kg). His pull is 30 N in magnitude…

A:

Q: Superman is applying a 17,000 N horizontal force to try and stop a speeding locomotive. This train…

A:

Q: a block of mass m = 10.2 kg sitting on a ramp that makes an angle θ = 21° with the horizontal. This…

A:

Q: A freight train has a mass of 1.5 × 107 kg. If the locomotive can exert a constant pull of 7.5 × 105…

A:

Q: A child is walking along the sidewalk at a constant speed of 1 m/s while pulling his dog sitting in…

A: Speed of Child (v) = Mass of Dog (m) = 30 kgWeight of Wagon Force (F) = 60 NAngle

Q: A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.7 m/s2. (a) If…

A:

Q: A rope is attached to Box A, and it is pulled on a rough surface due east with friction. The mass of…

A:

Q: A 2140 kg car traveling to the west at 17.1 m/s slows down uniformly. How long would it take the car…

A:

Q: Mary applies a force of 71 N to push a box with an acceleration of 0.48 m/s2. When she increases the…

A: Let the mass of the box = m Case 1) Applied force = 71 N Acceleration produced = 0.48 m/s2 Case 2)…

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: