A girl is sledding down a slope that is inclined at 30º with respect to the horizontal. The wind is aiding the motion by providing a steady force of 129 N that is parallel to the motion of the sled. The combined mass of the girl and the sled is 63.2 kg, and the coefficient of kinetic friction between the snow and the runners of the sled is 0.167. How much time is required for the sled to travel down a 298-m slope, starting from rest?

Q: An object of mass 5 kg kept on a rough surface is pulled by a forward force of 18 N. If the object…

A:

Q: A force of 32 N, parallel to the inclined plane, is necessary to make a crate rise, with constant…

A: Force applied on the crate=F=32 N Angle the inclined plane makes with the horizontal=θ=30∘ We have…

Q: A 65-kg skydiver jumps out of an airplane and falls 320 m, reaching a maximum speed of 69 m/s before…

A:

Q: A woman holds a book by placing it between her hands such that she presses at right angles to the…

A: Static friction,

Q: A heavy sled is being pulled by two people, as shown in the figure. The coefficient of static…

A: Given that:The coefficient of static friction between the sled and the ground, μs=0.571The…

Q: A body of weight 50 N is hauled along a rough horizontal plane by a pull of 18 N acting at an angle…

A: Normal force along vertical y axis N = mg - f sin14o N = 50 - 18 × 0.242  N = 50 - 4.356 N = 45.644…

Q: A 2000 kg car increases its speed from 2 m/s to 8 m/s in 3s on a rough road, while the engine…

A: Given,  m = 2000 kg  u = 2 m/s  v = 8 m/s  Forward Force F = 6940 N  Now the free body diagram of…

Q: A car has a mass of 1750 kg. If the driver applies the brakes while on a gravel road, the maximum…

A: Given that the value of mass and velocity and maximum friction force. Then We have to determine the…

Q: Two forces FA and FB are applied to an object whose mass is 11.9 kg. The larger force is FA. When…

A:

Q: A 14.9 kg is being dragged by a horizontal type to the left, while slowing down from 46 m/s to 6.1…

A:

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: The net external force on the 24-kg mower is stated to be 51 N. If the force of friction opposing…

A:

Q: The parachute on a race car of weight 8 820 N opens at the end of a quarter-mile run when the car is…

A:

Q: A traffic light is hanging from two cables. Cable #1 pulls up and left, making an angle of 45o with…

A:

Q: A 28 kg suitcase is being pulled with constant speed by a handle that is at an angle of 26 ∘ above…

A: Given, mass of the suitcase m = 28 kg Suitcase pulled by a handle at angle θ=26∘ Normal force…

Q: A boat has a mass of 6754 kg. Its engines generate a drive force of 4080 N, due west, while the wind…

A: The magnitude of acceleration can be calculated using following steps.

Q: A 9.60-kg mass (m2) is connected by a light, inextensible cord over a light, frictionless pulley to…

A: net force in the vertical direction of mass m1 is  N=m1g

Q: A 2000 kg car increases its speed from 2 m/s to 8 m/s in 3s on a rough road, while the engine…

A: Given: Mass m = 2000 kg Initial speed u = 2 ms Final speed v = 8 ms Force F = 6940 N Time t = 3 s To…

Q: A force of 550 N is applied to push a 45 kg crate across a 4-meter horizontal floor. The floor has a…

A: The condition would be as shown in figure  Friction opposes the change in motion , the maximum…

Q: SFS S\thetas A block of mass 4.48 kg initially at rest is pulled by a force of magnitude Fat an…

A:

Q: A block with a mass of 7.24 kg is on a horizontal surface that has friction. A string is pulling…

A:

Q: A force is applied to an initially stationary block of mass 5.70 kg that sits on a horizontal floor…

A: Given Data: The mass of a block is, m=5.70 kg The applied force on a block is, F=98.9 N The angle…

Q: Two weights, each weighing m, are hung over a pulley. If an additional weight of 100 g is attached…

A: Here given two weights each are weighing m. They are hanged from a pully. There is an additional…

Q: An impala is an African antelope capable of a remarkable vertical leap. In one recorded leap, a 45…

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Q: In the figure, a 5.50 kg block is sent sliding up a plane inclined at θ = 37.0° while a horizontal…

A:

Q: A 344-kg boat is sailing 14.0° north of east at a speed of 2.40 m/s. 23.0 s later, it is sailing…

A: Given: A 344 kg boat is sailing 14.00 north of east at a speed of 2.40 m/s 23 seconds later, it is…

Q: A 20-kg mass slides down a flat hill that makes an angle of 10° with the horizontal. If friction is…

A: Given  M = 20 kg  g = 9.81. Angle (a) = 10°

Q: A freight train has a mass of 1.5 x107 kg. If the locomotive can exert a constant pull of 7.5 x 105…

A: Since there is no frictional force here then by Newton's 2nd Law our force equation will be:…

Q: A block is sliding on a rough surface with a coefficient of static friction = 0.320 and a…

A:

Q: A typical car travels a distance of 100 km at 110 km/h. It then repeats the journey at 70 km/h. What…

A: According to question --- Given data --  distance - 100 km. first speed (v1) - 110 km/h. second…

Q: A 300-kg boat is sailing 17.0° north of east at a speed of 1.60 m/s. 35.0 s later, it is sailing…

A:

Q: he movers are trying to get a heavy crate (mass m) up a ramp into the loading dock of a uilding. One…

A:

Q: A person in a boat starts paddling, and it accelerates from 0 to 0.70 m/s in a distance of 0.51 m.…

A: Given,  mass of boat ,m = 83 kg distance, s = 0.51m Initial velocity, u = 0m/s Final velocity ,v =…

Q: A 397-kg boat is sailing 14.0° north of east at a speed of 2.40 m/s. 28.0 s later, it is sailing…

A:

Q: An accelerating crane system consisting of two masses connected by a cable that passes through a…

A: Analyze the diagram of the given situation. Note- Consider the rightward direction along the…

Q: When a mass of body tending to move on a rough surface, a counter-acting force is produced against…

A: Push or pull on an object is considered a force. The SI unit of force is Newton. Force is a vector…

Q: A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman…

A: Using Newton's 2nd law: F_net = m*a m = mass of box = ? a = acceleration of box  = 3.50 m/s^2 F_net…

Q: A 10-kg mass slides down a flat hill that makes an angle of 20° with the horizontal. If friction is…

A: Mass = 10 kg Angle = 20°

Q: A skateboard with mass of 50kg is pulled without friction across the ground by a rope that makes an…

A:

Q: A box of holiday decorations has a mass of 38 kg and is being pushed across the floor. The…

A: Mass of box =38kg Frictional force =56N Moved with constant velocity mean acceleration of box is =0

Q: A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman…

A: Using Newton's second law, F=mam=Fa

Q: A fisherman is fishing from a bridge and is using a "30.0-N test line." In other words, the line…

A: (a) When the line is moving at constant speed, the acceleration and hence the net force on the…

Q: A woman holds a book by placing it between her hands such that she presses at right angles to the…

A: Weight = mg In equilibrium, the friction will balance the weight of the body

Q: The block shown in the figure is sliding along a frictionless horizontal surface The block's mass is…

A:

Q: ar, which may slide on a vertical rod is subjected by three forces. A is 1200 N vertically upward.…

A: Resultant of forces can be determined by resolving the forces into its components.

Q: The coefficient of static friction between block A and a horizontal floor is 0.470, and the…

A:

Q: A locomotive is pulling 12 freight cars, each of which is loaded with the same amount of weight. The…

A: The net force on the third car is, T23-T34=ma=37000 kg0.78 m/s2=28860 N Now, rearrange the above…

Q: Two thieves want to steal a 1mx1mx1m Lazada Mystery Box worth of 1million pesos that is placed on a…

A:

Q: A shark, of mass 95 kg, is swimming with a constant velocity of 7.2 m/s [32° above the horizontal].…

A: Write a given values of this question.

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: