Question 1 The systems shown in Figure P5.21 are in equilibrium. If the spring scales are calibrated in newtons, what do they read? (Neglect the masses of the pulleys and strings, and assume the incline in part (c) is frictionless.) 5.00 kg 5.00 kg (а) (49.0 N ; 98.0 N ;24.5 N) 5.00 kg 30.0 5.00 kg 5.00 kg (c) (b) Figure P5.21

I was given this problem, and I don't really know what to do about the fact that the normal force doesn't equal the weight for this problem. How am I supposed to find the kinetic friction coefficient now? A box of mass 2,463g is on level ground being pulled by a force of 6.41N at angle 47.2 above horizontal. If the block is moving with a constant velocity, what is the kinetic friction coefficient? (Hint: the normal force does not always equal the weight; it does not in this case.)

There is a rough plane inclined at an angle θ to the horizontal where tan(θ)=12/5. Assume that μs = μk = 1.6. A rope applies a tension of 9 N to pull a 1.3 kg particle down the incline. What is theparticle’s acceleration? Use g=10m/s/s. (Side note: It will be helpful to draw the relevant free body diagram and to convert the decimal numbers to fractions.)

A cord passing over a pulley connects two masses, as shown, where m, = 3.60 kg and m, = 7.10 kg. The system accelerates with a magnitude of 1.34 m/s?. The coefficient of kinetic friction between the masses and the incline is the same for both masses. Assume the pulley is frictionless, and the cord is massless. (Due to the nature of this problem, do not use rounded intermediate values in your calculations-including answers submitted in WebAssign.) m2 m, 35.0° 35.0° (a) What is the coefficient of kinetic friction? (b) What is the tension (in N) in the cord?

Two blocks of masses m, = 4.0 kg and mg = 8.0 kg are connected with a string that passes over a very light pulley (Figure 1). Friction in the pulley can be ignored. Block 1 is resting on a rough table and block 2 is hanging over the edge. The coefficient of friction between the block 1 and the table is 0.70 (assume static and kinetic friction have the same value). Block 1 is also connected to a spring with a constant 300 N/m. In the initial state, the spring is relaxed as a person is holding block 2, but the string is still taut. When block 2 is released, it moves down for a distanced until it stops (the final state). Figure 1 of 1

This problem has been removed by your teacher and will not affect your score. A 75kg bicyclist (including the bicycle) is pedaling uphill with a speed increasing at a rate of 1.7m/s?. The bicyclist is also experiencing a 20N drag. Neglect any friction impeding her motion. How many forces are acting on the bicyclist? Are all forces on the bicyclist balanced? What is the magnitude of the net force on the bicyclist? unit 13° What is the magnitude of the normal force on the biyclist? unit How much force is she generating by pedaling? unit cam be d check answers

A ball with mass 0.1 kg is thrown upward with initial velocity 5 m/s from the roof of a building 60 m high. Assume there is a force due to |v| air resistance of magnitude directed opposite to the velocity, where 30 the velocity v is measured in m/s. NOTE: Use g=9.8 m/s² as the acceleration due to gravity. Round your answers to 2 decimal places. a) Find the maximum height above the ground that the ball reaches. Height: m b) Find the time that the ball hits the ground. Time: seconds c) Use a graphing utility to plot the graphs of velocity and position versus time.

Systems are in equilibrium. If the spring scales are calibrated in newtons, what do they read? Ignore the masses of the pulleys and strings and assume the pulleys and the incline are frictionless. (Let m = 2.66 kg and ? = 29.0°.) scale in (a) N scale in (b) N scale in (c) N scale in (d) N

Three stacked blocks have a downward force F' exerted on them as shown: Assume the system is at rest (such as blocks stacked on a stationary table). If m = 6.5 kg and F' = 9.9 N, what is the normal force exerted on the 5m block by the 8m block? Express your answer in N, to at least one digit after the decimal point.