Exercise Take g = 9.8ms-2 1 A boy and his skateboard of total mass 60kg coasts down a frictionless ramp at an angle of 30° to the horizontal. (a) Calculate the normal force acting on the boy and skateboard. (b) Calculate the force acting on the boy and skateboard parallel to the ramp. 2 The boy now coasts down another ramp, but this time the ramp has a rough surface. (a) Calculate the normal force acting on the boy and skateboard. (b) Calculate the force acting on the boy and skateboard parallel to the ramp. (c) If the ramp has a frictional force of 54N, what is the net force acting on the boy and the skateboard? (d) Calculate the acceleration of the boy. (e) If the boy started from rest, and the ramp is 4m long, what was the speed of the boy at the bottom of the ramp

A block freely slides down a frictionless ramp for 13.0 seconds. Draw the free body diagram of this scenario. Determine if there are any types of equilibrium involved. Calculate the distance traveled down the ramp at the end of those 13.0 seconds

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If the child has a mass of 19.4 kg, calculate the magnitude of the force in newtons the mother exerts on the child under the following conditions. (b) The elevator accelerates upward at 0.762 m/s?. N Calculate the ratio of this force to the weight of the child. force child's weight (c) The elevator moves upward at a constant speed. Calculate the ratio of this force to the weight of the child. force child's weight

Answer Saved Suppose the roller skating woman has a mass of 41.3 kg. Her roller blades have a coefficient of kinetic friction 4g = 0.0306 with respect to the street. She approaches the car, slowing to a speed of v = 6.23 m/s when she touches the car. If the average force she exerts to slow herself down has a magnitude of F = 68.3 N how long does it take for her to come to a stop?

PROBLEMI The 260kg crate shown in the figure rests on a horizontal surface for which the coefficient of kinetic friction is 025. If the crate is subjected to a 400 N towing force as shown determine the velocity of the crate in 5 s starting from rest PROBLEM 2 PROBLEM 3 The 80 kg block A shown in Figure is released from rest If the masses of the puleys and the cord are neglected determine the speed of the 12 kg block B in 38 m₁ P = 400 N IIA 8 = 30° 30° Consider the masses m, 20 kg and m, 18 kg in the system represented by the figure below. If the coefficient of friction is Of and the inclination angle is 30°, find the acceleration of the system and the tension in the cord joining two masses Datum m₂

A physics professor is pushed up a ramp inclined upward at an angle 30.0° above the horizontal as he sits in his desk chair that slides on frictionless rollers. Part A The combined mass of the professor and chair is 86.0 kg. He is pushed a distance 2.10 m along the incline by a group of students who together exert a constant horizontal force of 610N. The professor's speed at the bottom of the ramp is 1.85 m/s Use the work-energy theorem to find his speed at the top of the ramp. Express your answer in meters per second. V ΑΣφ ? V = m/s 國

And also please part c what is the magnitude of the resultant force in newtons

Help with the following question

A 6 kg piece of wood is locked at rest on a given horizontal surface. a. Draw all forces acting on the wood, and calculate the magnitude of each force if µs = 0.6