1 A boy and his skateboard of total mass 60kg coasts down a frictionless ramp at an angle 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.
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- A block with a mass of m = 48 kg rests on a frictionless surface and is subject to two forces acting on it. The first force is directed in the negative x-direction with a magnitude of F1 = 10.5 N. The second has a magnitude of F2 = 21.5 N and acts on the body at an angle θ = 12° measured from horizontal, as shown. 1) Draw the correct free body diagram 2)Write an expression for the component of net force, Fnet,x, in the x-direction, in terms of the variables given in the problem statement. 3)Write an expression for the magnitude of the normal force, FN, acting on the block, in terms of F2, g, and the other variables of the problem. Assume that the surface it rests on is rigid. 4)a a constant horizontal force is applied to block A, which pushes against block B with a 20.0 N force directed horizontally to the right. In Fig. 5-51b, the same force is applied to block B; now block A pushes on block B with a 10.0 N force directed horizontally to the left. The blocks have a combined mass of 12.0 kg. What are the magnitudes of (a) their acceleration in Fig. 5-51a and (b) force Fa? A B (a) B (6)1. A student applies a force of magnitude 75 N at an angle of 37o with the horizontal to push a 52-kg sled a distance of 4.0 m across a frictionless surface. Assuming the sled started from rest, find the final speed of the sled. 2. A student applies a force of magnitude 39.0 N at an angle of 22.6owith the horizontal to push a 4.00-kgtextbook 1.00 m across a table from rest to a final speed of 2.00 m/s. Find the work done by friction on thetextbook.
- A 100-kg ice hockey player collides head-on with a 70-kg player. If the first player exerts a force of 500 N on the second player, how much force is exerted by the second player on the first? 100 kg 70 kg - 500 N - 1000 N The coefficient of static friction between a sled and the snow is 0.3, with a coefficient of kinetic friction of 0.2. A 500 N female sits on the 100 N sled. How much force directed parallel to the horizontal surface is required to start the sled in motion? 90 N 180 N 270 N 360 Npart d onwardsPROBLEMI 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
- Don't use chat gpt It Chatgpt means downvoteA 2.80-kg object is moving in a plane, with its x and y coordinates given by x = 2t² - 4 and y = 2t³ + 3, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object at t = 2.45 s. 33 X If you know the position of an object as a function of time, you can calculate the acceleration as a function of time using calculus methods. NProblem 8: Consider a bowling ball of mass M attached to two ropes. One rope is being pulled horizontally. The second rope is tied to the ceiling (see figure) and is at a 45° with respect to the ceiling.The bowling ball is stationary. T, M Please use the interactive area below to draw the Free Body Diagram for the bowling ball. A Add Force O Reset All T1 v 45 vx T1 Ftotal,x: + (pos) Ftotal,y: + (pos)