Mechanics | Relativity Answers

What would happen if the work energy theorem or the law of conservation disappeared? What would change on earth?

A student has a weight of 655 N. While riding a roller coaster they seem
to weigh 1.96x103 N at the bottom of a dip that has a radius of 18.0 m. What
is the speed of the roller coaster at this point?

A 1.50 m long closed glass tube, a so-called Customer tube, has a speaker at one end. The tube is filled with a gas and in addition there are small cork crumbs that show nodes and bends in the standing longitudinal sound waves that arise in the tube. When the sound from the speaker had the frequency 870 Hz, a standing wave with a total of 7 pcs. nodes, including those at the endpoints of the tube. Determine the speed of sound in the gas.

Consider a weathered rock or soil particle lying on a slope. How will the gravitational force pulling the particle downward along the land surface vary with the inclination of the slope?

You are playing a billiard game with your friends. You noticed that 8-ball spins without rolling. What do you think is the inertia of the 8-ball in angular momentum if it weighs 1.5 lbs and its radius is 1 inch?

You catch an exotic beetle while you are in the garden. You tie one of the feet of the beetle to string and then hold the other end of string. Once you release the beetle from your hand, the beetle starts flying in circle in a counterclockwise manner with a velocity of 8 m/s. The length of the string from your hand to the beetle’s foot is 14 inches. What is the angular momentum of the beetle?

If your concave plate with a mass of 2 kg and spinning at a velocity of 4 rad/s, what is its angular momentum?

Your concave plate with a mass of 2 kg is spinning on top the table with a velocity of 1.5
rad/s for 2 seconds then your brother came and spins it more creating a velocity of 4 rad/s
for 6 seconds. What is the angular acceleration of your concave when you are spinning it
and the angular acceleration after your brother spins it?

Q.A free body diagram of body shows a body....
(A)Isolated from all effect, isolated from its surrounding and all external forces acting on it
(B)separately from its surrounding and all external & internal forces acting on it
(C)isolated from its surrounding and all external actions acting on it
(D)None of these

A woman rides a carnival Ferris wheel at radius 15 m, completing five turns about its horizontal axis every minute. What are (a) the period of the motion, the (b) magnitude and (c) direction of her centripetal acceleration at the highest point, and the (d) magnitude and (e) direction of her centripetal acceleration at the lowest point?