Other Physics Answers

II. Solve the following completely. Box your final answers.

Add the following vectors graphically. Use scale 1cm = 1m.

Given: A = 2m, E and B = 5m, 350 N of W, find R = A + B.

11. Using parallelogram method

12. Using polygon method

3. A backpack suspenden motionless. A grade 12 student rests a backpack upon his shoulder. The pack is suspended motionless by two straps from his shoulder.Draw the free-body digrams of the forces acting on each.Identify the forces acting on the object.Identify whether the net force is balanced or not balanced.

4. A car slowing down. A car is coasting to the left and slowing down.Draw the free-body digrams of the forces acting on.Identify the forces on the object. Identify whether the net force is balance or not balance.

1. A gymnast holding on two ropes. A gymnast is holding onto two ropes tht attach to the ceiling.Draw the free-body digrams of the forces acting on.Identify the forces acting on the.Identify whether the net force is balanced or not balanced.

2.An egg is free-falling from a nest in a tree. Neglect air resistance.Draw the free-body digrams of the forces acting on.Identify the forces acting on the object.Identify whether the net force is balanced or not banced.

A pulley is mounted on a frictionless axis and then the pulley is attached to the higher end of the inclined surface . A massless cord is wrapped around the pulley while its other end is tied to a 1.0 kg object. The pulley has a radius of 20 cm and moment of inertia of 0.4 kg m². The angle of the surface is 37° and the coefficient of kinetic friction is 0.2. The object is released from rest. The pulley starts to rotate as the object moves and the cord unwinds. Determine the acceleration of the object and the tension in the cord.

A small ball of mass 2*10^-2kg having a charge of 1microcoulomb is suspended by a string of length 0.8m. Another identical ball having the same charge is kept at the point of suspension. Determine the minimum horizontal velocity which should make complete revolution

A uniform charge wire, linear charge density d, is laid in the form of a semi circle of radius r. Find the electric field generated by the semi circle of the center

Create a short video demonstrating Newton’s third law, using an example not presented in this activity (for instance, you cannot use the example of a pop can sitting on a table). Be creative!

In your video:

• Identify the two objects exerting the action and reaction forces.
• Describe how the reaction force affects the first object, and how the reaction force affects the second object.
• If your objects are in motion, demonstrate the motion.

While the video does not have to include you narrating, at some point, please show yourself in the video.

If your video features a friend or family member, or even a stranger, be sure to get their permission first, before using the video.

A car slows from 22 m/s to 3.0 m/s with a constant acceleration of -2.1 m/s2.  How long does it require in the unit of seconds?