Three 81.6 g masses are connected in a triangular shape by massless rigid wires as shown in the first image (which is not drawn to scale). The coordinates of each mass are given in centimeters. Mass A is located at (0,0) , mass B is at (12.2,22.5) , and mass C is at (21.3,13.4) . Find the ? - and ? ‑coordinates of the center of mass of the triangular object. A graph has a vertical Y axis and a horizontal X axis. Three masses are shown. Mass A is located at (0,0), mass B is at (12.2,22.5), and mass C is at (21.3,13.4). ?cm= cm ?cm= cm Two more 81.6 g masses are connected by a straight piece of wire and affixed to the original configuration as shown. The coordinates of mass D are (0,−27.0) and the coordinates of mass E are (0,27.0) . Find the ? - and ? ‑coordinates of the new center of mass of the combined object. A graph has a vertical Y axis and a horizontal X axis. Five masses are shown. Mass A is located at (0,0), mass B is at (12.2,22.5), mass C is at (21.3,13.4), mass D is at (0, -27.0), and mass E is at (0, 27.0). ?cm= cm ?cm= cm

What are the core concepts and methods of Kinematics?

What are the core concepts and methods of Dynamics?

What are the core concepts and methods of Work-Energy relationships?

How all of the above are related?

How consideration of others perspectives changed or improved your thinking on all of the above?

1. A 1400 kg car goes around a corner with a radius of curvature= 60m.

a) if the coefficient of static friction between the tires and the roads is 0.800 what is the maximum speed the driver can go before skidding. the curve is unbanked/flat.

2. A 2.40kg uniform rod of length of .750m rotates about its center. At t=0, its angular speed =2.50 rad/sec. It smoothly increases its rotation rate with an acceleration a=1.50 rad/s^2

a) what is its angular speed at t=6.50 seconds

b) how many radians would a spot on the rod have gone during those 6.50 seconds

c) what is the linear speed at t=6.50 seconds at the spot at the end of the rod

d) find the force that would need to be applied tangentially to the end of the rod have this acceleration

A 5.80 x 103 kg delivery truck moving with a velocity of 20 m/s hits a 1.50 x103 kg parked car. As a result of the impact, the car was set in motion at 31.8 m/s. (Assume the car –truck to be an isolated system) (a) Sketch the situation. (b) Find the velocity of the truck immediately after the collision; (c) Find the kinetic energy of the car-truck system before and after the collision. (d) Is the car-truck collision elastic or inelastic? Explain (e) What is the change in momentum of the car? Assuming the collision time to be 2 seconds, how much average impact force did the car experience? (f)What is the change in the momentum of the truck? Solve for the impact force experienced by the truck.

Two pucks are sliding across a frictionless surface. Puck A has a mass of .330 kg and a velocity of 5.50 m/s in the x direction. puck be has a mss of .440 kg and a velocity of 6.60 m/s in the negative x direction.

the pucks collide an bounce of each other. after the collision puck a has a velocity of 1.10 m/s in the positive y-direction. What are the x and y components of the velocity of puck ba fter the collision.

Two ice skaters, with masses of 50.0 kg and 65.0 kg , are at the center of a 30.0 m -diameter circular rink. The skaters push off against each other and glide to opposite edges of the rink.

If the heavier skater reaches the edge in 10.0 s , how long does the lighter skater take to reach the edge?

Find the heat capacity of a block of unknown material. You will immerse the block, with its temperature known, into a known quantity of water, which is at a very different temperature than the block. After they reach equilibrium, they will be at the same final temperature. From the change of temperature of both, calculate the block's heat capacity.

NOTE: You can heat up or cool the block using hot water or ice water

HOW WILL I DO THIS ? ?? ? ? explain please physics wizards of chegg

• How is Bernoulli’s Principle equivalent to the Work Energy Theorem and the Conservation of Energy Principle?

A sound source A and a reflecting surface B move directly toward each other. Relative to the air, the speed of source A is 29.7 m/s, the speed of surface B is 63.5 m/s, and the speed of sound is 330 m/s. The source emits waves at frequency 1350 Hz as measured in the source frame. In the reflector frame, what are (a) the frequency and (b) the wavelength of the arriving sound waves? In the source frame, what are (c) the frequency and (d) the wavelength of the sound waves reflected back to the source?

Near Earth Objects (NEOs) is anything in space that comes too close to Earth (within 1.3 AU) and is sufficiently large. Describe two challenges astronomers face in finding NEOs.

Additionally, scientist distinguish between potentially hazardous objects (140m or larger) and hazardous objects (larger than 1km). What would happen to Earth if an object greater than 1km collided with the planet?

What would happen to Earth if a potentially hazardous object collided with the planet?

What is kinetic energy and how does it relate to the Boltzmann distribution?

1. (a) Find the charge stored on each capacitor in Figure 18.24 (C₁ = 30.0 µF, C₂ = 4.50 µF) when a 1.51 V battery is connected to the combination.
C₁
___C?
C₂
___C?
0.300 µF capacitor
___C?

(b) What energy is stored in each capactitor?
C₁
___J?
C₂
___ J?
0.300 µF capacitor
____J ?

2.(a) What voltage must be applied to the 10.0 µF capacitor of a heart defibrillator to store 450 J in it?
____ kV ?
(b) Find the amount of stored charge.
___ C ?

A hydraulic jack is designed to lift a car by exerting an output force 100 times as large as the input (see class notes). (a) What must be the ratio of the cylinder diameter on the output side to that on the input side? (b) If the input side is pushed down by 10 cm, how much does the output side move up? (The fluid volume lost on the input side is gained on the output side.) (c) Show that the work we do on the input side equals the work done on the car on the output side (as it must), assuming no frictional losses.

A 0.042 kg aluminum bullet traveling at 456 m/s strikes an armor plate and comes to a stop. If all its energy is converted to heat that is absorbed by the bullet, what is the bullet's temperature change in degrees Celsius? (This is a multi-step problem.)

1a. An unidentified flying object (UFO) is observed to travel a total distance of 46000 m, starting and ending at rest, over a duration of 1.57 s. Assuming the UFO accelerated at a constant rate to the midpoint of its journey and then decelerated at a constant rate the rest of the way, what was the magnitude of its acceleration? Express your answer in g s , where 1 g = 9.81 m/s^2.

b. A Ford passes a Toyota on the road (both vehicles are traveling in the same direction). The Ford moves at a constant speed of 45.3 m/s. Just as the Ford passes it, the Toyota is traveling at 16.0 m/s. As soon as the Ford passes the Toyota, the Toyota begins to accelerate forward at a constant rate. Meanwhile the Ford just keeps going at a steady [] m/s to the east. The Toyota catches up to the Ford a distance of 89.0 m ahead of where the Ford first passed it. What was the magnitude of the Toyota s acceleration?

c. Driving down the road at a speed of 33.7 m/s, you suddenly notice a fallen tree blocking the road a distance of 85.1 m ahead of you. You step on the brake pedal and decelerate at a constant rate. What must the magnitude of your acceleration be so that you will come to a stop 5.4 m in front of the tree?