Suppose a person wishes to lift a large rock with a lever. If the rock has a mass of 250kg and is located 50 cm from the pivot, and the person can put a force of 650N straight down on her end of the lever, what is the minimum distance from the fulcrum she has to be to lift the rock?

You place a 5 kg brick at 1.25 m on the left side of a lever system. You place another 5 kg brick at 0.25 m on the left side as well. Where on the right side would you place a 30 kg rock to balance the system? A 0.5 m 0.25 m C 1.75 m D 1.25 m

In the figure, what magnitude of force F applied horizontally at the axle of the wheel is necessary to raise the wheel over an obstacle of height h = 0.356 m? The wheel's radius is r = 0.662 m and its mass is m = 1.71 kg. %3D Number i Units

A mechanic turns down a bolt and develops 85 N·m of torque with a wrench that’s 20 cm in length. How much force does the mechanic turn the bolt with? A) 1,700 N  B) 425 N   C) 17 N D) 4.25 N E) none is correct

OO O O ABC * Question 4 A screw driver acts as a lever when used to open a paint can, If Juan applies a force of 25 N to the handle of the screwdriver. What mechanical advantage does the screwdriver provide if it applies a force of 350 N to the lid? 0.08 14 325 375 O Time Remaining: 1 hour, 7 minutes Ozu Iluminate EducationTM Inc. O9 0 12:41 C esc backs & # $ % 9. @ 7 8. 3 4 2

9. Situational Question The rotation of a pulley is defined by the relation a=2t where a is in rad/s^2 and t is in seconds. When t=0, w=4 rad/s and = 0. Compute the value of wat t=5sec. a. 8 rad/s b. 25 rad/s c. 4 rad/s d. 29 rad/s Compute the value of e at t=5sec. a. 11 rad b. 62 rad c. 52 rad d. 31 rad A boy kicks a 0.15kg ball such that it leaves the ground at an angle of 45 degrees with the vertical and strikes the ground at the same elevation at a distance of 15m away. Determine the impulse on his foot on the ball at A. a. 1.749 kg-m/s b. 1.280 kg-m/s c. 1.947 kg-m/s d. 1.820 kg-m/s 9i. 9ii. 9iii.