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? A. 0.63 m B. 1.24 m C. 1.88 m D. 2.73 m

TEXT ANSWER Question 22 When Jenny couldn't lift a box by herself, she decided to use a lever to move it. She placed a fulcrum 1.6 m away from the box and used a 2.0 m lever to try to lift the box. Her effort was still unsuccessful. Explain why Jenny was unable to lift the box with her lever, and sug- gest a way she can adjust the lever to improve her chances of success. Use math to support your answer.

A constant net torque is applied to an object. Which one of the following will NOT be constant? A. All the above are constant B. Angular acceleration C. Moment of inertia D. Center of gravity E. Angular velocity

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 solid sphere of mass 4.0 kg and radius 0.20 m with a speed of 10 m/s rolls up from the bottomof a ramp inclined 20 ̊. How far approximately the ball will stop on the incline from the bottom?a. 3 m b. 7 m c. 10 m d. 15 m e. 20 m

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

A 32.0 kg child sits on one end of a long uniform beam having a mass of 18.0 kg, and a 40.0 kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance 1.20 m from the 32.0 kg child. How long is the beam?  A. 1.93 m  B. 2.20 m  C. 2.07 m  D. 1.97 m  E. 2.12 m

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.

Please help me on sixth question according table and figure. Solve it using vectors.