A moving truck (in $200 kg) a parked on a hail that is indlined Assumintht-9200

Question

A moving truck (in $200 kg) a parked on a hail that is indlined Assumintht-9200 k) is parked on a hill that is Inelined at an angle of 11 from the hotizontal value, what is the coefficient of static friction of the surface? the static friction between the truck and surface on which it is parked is at its maximum that odk limbing with a friend, you take a break on a ledige that 12 m above the ground. You realise you left your water bottle in the car, so your friend, who has not vet started climbing, gets the bottle to a rope for you to pull up. The full bottle has a mass of 1.2 kg, and you are able to lit with an acceleration of 1.9 m/s. What is the tension in the rope? . Two 8.5 kg masves are hung from a horizontal surface by two (masales) springs, as shown in the fgure. The top spring has a spring constant of 400 N/m, and the bottom spring has a spring constant of 200 N/m. How long is each spring in this configuration if they both have rest lengths of 6.0 em? 4. After rounding second base, a baseball player with a mass of 77 kg slides into third base. The coefficient of player and the ground is 0.42 What is the magnitude of the friction force acting 3 s for the player to come to a rest at the base, what was his velocity when he on the player? If it takes 1. initiated his slide? 5. Suppose you are pulling a 4.2-kg block acros a rough, horizontal surface with a spring that has a spring constant of 100 N/m. What is the coefficient of kinetic friction between the surface and the block if the spring stretches by 3.2 cm when you pull on the block at angle of 15 above the horizontal? Assume the block is moving with constant velocity 6. At a recent concert you notice that a large speaker (m = 25 kg) hangs from the ceiling by two cables. You are able to deduce that each cable connects to the speaker at an angle of 32° relative to the vertical. How does the tension in one of the cables compare to the tension in the other (show this by using Newton's Second Law)? Find the tension in each cable. hanging from a horizontal support is 8.5 crn long, when you attach a 670 g mass, the pingdhes to s leis the spring constant of the spring? What mass must you attac to the spring so it stretches to a length of 14 cm?

Explanation / Answer

Solving first question of the page

Since static friction is at its maximum value

So friction force=u*mgcos(theta)

Where u is coefficient of friction

For balancing force

mgsin(theta)=umgtan(theta)

We got

tan(theta)=u

So u=0.194

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