meter stick has a fixed axis of rotation at 50 m. A 4 kg mass is located at the 10 m marker, a 5 kg mass is located at the 75 m marker. Where would you place a 3 kg mass to force the system to be in equilibrium?

What is the torque by the trash can about the center of the seesaw, in N-m? Use g = 10 m/s². Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. 8 17 6 5 4 3 2 2 3 10 kg 4 5 6 7 8

Q2

5. The tolerance is -+1 in the 2nd significant digit.

A wrench 0.8 meters long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of (0,-1,-3) at the end of the wrench. Find the magnitude of the force in newtons needed to supply 100 newton-meters of torque to the bolt. Force: newtons

A student stands on a platform that is free to rotate and holds two dumbbells, each at a distance of 65 cm from his central axis. Another student gives him a push and starts the system of student, dumbbells, and platform rotating at 0.50 rev/s. The student on the platform then pulls the dumbbells in close to his chest so that they are each 22 cm from his central axis. Each dumbbell has a mass of 1.00 kg and the rotational inertia of the student, platform, and dumbbells is initially 2.40 kg-m². Model each arm as a uniform rod of mass 3.00 kg with one end at the central axis; the length of the arm is initially 65 cm and then is reduced to 22 cm. What is his new rate of rotation? HH 65 cm 65 cm M 22 cm

4. The diagram shows a wheel rolling without slipping along a horizontal road, from left to right. A piece of mud on the rim becomes detached at M when the contact between wheel and road is at P. Which of the arrows, A, B, C, D, E best shows the initial direction of the path followed by the detached particle ? C Arrow C A Arrow A B Arrow B D Arrow D E Arrow E C В M.

A uniform meterstick is in static rotational equilibrium when a mass of 220 g is suspended from the 5 cm mark, a moss of 120 g is suspended from the 90 cm mark, and the support stand is placed at the 40 cm mark. What is the mass of the meterstick?

A thin cord is wrapped around a uniform grindstone of radius 0.30 m and mass of 25 kg supported by bearings that produce negligible friction torque. The cord exerts a steady tension force on the grindstone, causing it to accelerate from rest to 60 rad/s in 12 s. (lgrindstone = 5 What is the magnitude of the tension force of the cord? O 5.6 N 11.3 N O 18.7 N O 37.5 N

In the system shown below, compute the net torque about the end of the rod. 60 N 50 N 0.2 m 0.6 m 80 N 30° 70 N 0.2 m