E An aluminum block of mass my 4,05 kg and a copper block of mass m₂ 7.35 kg are connected by a light string over a frictionless pulley. They sit on a steel surface as shown in the figure below, where 0-32.0°. (See the table below for the appropriate coefficients of friction). Aluminum No (a) When they are released from rest, will they start to move? OYes Copper (b) If the blocks move, determine the magnitude of their acceleration. (If the blocks do not move, enter 0.) ✓ m/s² 0 (c) If the blocks move, determine the magnitude of the tension in the string. (If the blocks do not move, enter 0.) 0 ✔N (d) If the blocks do not move, determine the sum of the magnitudes of the forces of friction acting on the blocks. (If the blocks move, enter 0.) N Coefficients of Friction Rubber on concrete Steel on steel Aluminum on strel Glass on glam Copper on need Wood on wood Wased wood on we snow Wased wood on dry snow Metal on metal (lubricated) Teflon on Teflon Ice on ice Synovial joints in humans 1 vakars are appel N 1.0 0.74 0.61 0.94 0.58 0.25-05 0.14 0.15 0.04 0.1 0.01 0.8 0.57 0.47 0.4 0.36 0.2 0.1 0.04 0.06 0.04 ons 0.005 O A I B Ⓒ 4x D

g force is max gravetional force

Cray-Zee is speeding along at 26 m/s as she approaches the level section of track near the loading dock of the Whizzer roller coaster ride. A braking system abruptly brings the 392-kg car (rider mas included) to a speed of 3 m/s over a distance of 5.7 meters Determine the magnitude (positive answer) of the braking force applied to Cray-Zee's car. Answer: N

As shown in figure, find that at what distance body A will attain a velocity of 3 m/s when starts from rest.Assume the coefficient of Friction as 0.2 and pulleys are frictionless and weightless.

Tendons are strong elastic fibers that attach muscles to bones. To a reasonable approximation, they obey Hooke's law. In laboratory tests on a particular tendon, it was found that, when a 0.255 kg object was hung from it, the tendon stretched 1.25 cm Part A Find the force constant of this tendon in N/m Express your answer in newtons per meter. Part B Because of its thickness, the maximum tension this tendon can support without rupturing is 145 N. By how much can the tendon stretch without rupturing, and how much energy is stored in it at that point? Express your answer in centimeters. Part C Express your answer in joules.

A 8760-kg car is travelling at 31.7 m/s when the driver decides to exit the freeway by going up a ramp. After coasting 411 m along the exit ramp, the car's speed is 12.0 m/s, and it is h = 14.3 m above the freeway. What is the magnitude of the average drag force Farag exerted on the car? N Farag

In the situation below, m1=20 kg and m2=10 kg. The masses are at rest. A) What is the minimum coefficient of friction between the incline and m1? B) The sting and cut and m1 slides down the incline. What is its speed when it reaches the bottom? The block is initially at height of 10 meters.

Three forces act at point O as shown. Force F3lies in the x-y plane. Select the expression that denotes a unit vector in the direction of F1 . a. - 1/3 i - 2/3 j - 2/3 kb. - 1/3 i + 2/3 j + 2/3 kc. - 1/3 i + 2/3 j - 2/3 kd. - 1/3 i - 2/3 j + 2/3 k Determine the direction angles (α, B ,y ) for F₂ . a. (103ᵒ , 72.1ᵒ , 22.6ᵒ ) b. (103ᵒ ,108ᵒ , 22.6ᵒ )c. (76.7ᵒ , 72.1ᵒ ,157ᵒ ) d. (103ᵒ , 72.1ᵒ ,157ᵒ ) Determine the angle between F1 and F3 . a. 26.0ᵒ b. 132ᵒc. 90.0ᵒ d. 0