A man pulls a 100 kg with a rope across the floor with a force F. The rope makes a 20° angle with the horizontal. (a) If μs = .25, what is the minimum force the man must pull the rope to move the crate? (b) If μk = .15, what is the acceleration of the crate if the force is unchanged?

Q: Determine the magnitude and angle 0 of F, given that the resultant force from the three forces…

A: Write the given forces, and their x- and y-components as follows.

Q: A man is standing on a platform that is connected to a pulley arrangement. By pulling upward on the…

A: The forces acting on the system are the pulling force acting upward and the weight of the system…

Q: Two 25.0 N weights are suspended at opposite ends of a rope that passes over a light, frictionless…

A: Tension in the rope equals the weight suspended on one side of the rope. T=W=25.0 N

Q: A block is pushed up a frictionless 30° incline by an applied force as shown. If F = 39 N and M =…

A: The free body diagram is given as: Let a be the resultant acceleration,  There will be motion in…

Q: A block is pushed up a 30° incline by an applied force as shown. If F = 90 N and M = 4 kg, and μk =…

A: Force applied to the box is F = 90 N Mass of the block is M = 4 kg Coefficient of kinetic friction…

Q: A 2kg box is being pulled up a ramp by a force of 24N. The ramp is at an angle of 35 degrees from…

A: Mass of box (m) = 2 kg Applied force = 24 N Angle of ramp (θ) = 35oFrictional force (f) = 1.5 N

Q: A block is pushed up a 30° incline by an applied force as shown. If F = 61 N and M = 3 kg, and μk =…

A:

Q: Two forces are applied to an object, F1=3i-2j , F2=i+3j . What is the resultant force on the…

A:

Q: An elevator with its occupants has a total mass of 1425. kg. The cable that allows the elevator to…

A: If an elevator with occupants of mass 'm' moving downward with acceleration 'a' then…

Q: Two crates connected by a rope lie on a horizontal surface (see figure below). Crate A has mass mA…

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

Q: chandelier is suspended by two identical, vertical chains side by side. The chandelier's mass is m =…

A: m=6.7 kg assume g=10 m/s2 tension in the chains=T+T= 2T

Q: elevator cabs A and B are connected by a short cable and can be pulled upward or lowered by the…

A: Draw the free-body diagram of the elevator B.

Q: The forces acting on the sailplane are its weight W = -500j (lb.) , the drag D = -200i + 100j (lb.),…

A: W = -500 j^ lb D = -200 i^ +  100j^ lb Lift force = L

Q: The x-component

A:

Q: A planet has a mass of 7.77 x 1023 kg and a radius of 3.29 x 10° m. (a) What is the acceleration due…

A:

Q: You managed to pull a heavy crate up a ramp on a truck. The crate has mass 50 kg. You were pulling…

A:

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: A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. The ramp is tilted at 20° and is…

A:

Q: A 10.8-kg block is suspended from the ceiling of an elevator by a cord rated to withstand a tension…

A: Let the elevator is ascending with minimum acceleration a when cord breaks. The net downward force…

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A:

Q: The helicopter view in the figure shows two people pulling on a stubborn mule. The person on the…

A: GivenF1=120 N , θ1=60°ansF2=80 N , θ2=75°

Q: The suspended 2.41 kg mass on the right is moving up , the 2.1 kg mass slides down the ramp and is…

A:

Q: A woman is pushing a box along the ground. She is exerting a horizontal force of 156 N on the box.…

A: frictional force = 135 N μmg = 135 μ * 84 * 9.8 = 135 μ = 0.164 Therefore, coefficient of kinetic…

Q: the

A: Given: Maximum static friction between the sanding block and wooden board = 25 N Applied force = 20…

Q: An antelope is being pulled by two forces whose vector-component expressions are: F1 = -6.7Ni +…

A: Given, F1⇀=-6.7i^+7.3j^+9.7k^NandF2→=-4.2i^-9.4j^+3.1k^N

Q: An antelope is being pulled by two forces whose vector-component expressions are: F1 = -3.5Ni +…

A: The forces are  F1 = -3.5Ni^ + 3.4Nj^ + 3.9Nk^ F2 = 3Ni^ + 2.6Nj^ + -1.5Nk^ The magnitude of the…

Q: In the first figure here, a sled is held on an inclined plane by a cord pulling directly up the…

A: The force when μ=0 is F1=1.74 N. The force when μ2=0.510 is F2=5.33 N.

Q: A child pulls a 20 kg sled with a rope that makes an angle of 30° with the ground. The tension in…

A:

Q: You managed to pull a heavy crate up a ramp on a truck. The crate has mass 45 kg. You were pulling…

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: Mary applies a force of 71 N to push a box with an acceleration of 0.41 m/s². When she increases the…

A:

Q: A coin is resting on the surface of a closed book. As you slowly open the cover, the coin remains in…

A: The angle of repose is the maximum angle at which any object remains stable. It's the threshold…

Q: A rescue helicopter lifts a 59.1-kg person straight up by means of a cable. The person has an upward…

A: To find tension in the cable, first draw the free body diagram of the person as shown in the figure…