Suppose I drop a 44-kg anvil from rest and from such a height that the anvil reaches a speed of 10 m/s just before hitting the ground. Assume the earth was at rest before I dropped the anvil.  (a) What is the earth’s speed just before the anvil hits? The earth’s speed is ____x10^-22 m/s   (b) How long would it take the earth to travel 1.0 μm (about a bacterium’s width) at this speed? It would take ___million years

Q: The commander has asked you shoot cannonball off the side of a cliff that is 70 meters tall. The…

A: From the kinematics equation, the value of the displacement is: Substitute the known values and…

Q: In 1992, a 14 kg meteorite struck a car in Peekskill, NY, leaving a 20-cm-deep dent in the trunk.…

A: The specific equation of motion you use depends on the nature of the motion and the forces involved.…

Q: A ball starts from rest from a hill of height 15.0 meters, when the ball gets to the bottom of the…

A: Given Data: Initial velocity of ball is u=0. The height of hill is h=15 m. The time taken is,…

Q: Choose the correct option and write - (i) A ball thrown vertically up takes t time to reach the…

A:

Q: A 14 kg penguin slides on its belly down an icy, frictionless glacier. If the penguin started from…

A: Write the given values of the problem- Mass=14 kg final speed(vf) vf=14 m/s

Q: A particular spring has a rest length of 5.0 cm when it is not compressed, and a length of 4.5 cm…

A: Given data: The free length of spring is l=5 cm. Length with m=10 kg l'=4.5 cm. Acceleration of…

Q: 2) A volleyball of mass 0.28 kg is dropped from the top of the bleachers (height equals 12 m). What…

A: Given: The mass of the volleyball is 0.28 kg. The height of the volleyball from the ground is 12 m.…

Q: Use

A:

Q: Go back to question 6 but this time assume uk=0.2.  a) How much time elapses before the block…

A: This question belongs to friction.

Q: Two planets of mass 1 x 1025kg are release from rest 8.0 x 1012 m apart.  What is the speed of the…

A: Given: Mass of planets : m1=m2=m=1×1025 kg Distance r=8.0×1012m To find the speed ''v'' at half the…

Q: An 8 kg object is placed on the top of a scale (balance) inside the elevator. If the elevator…

A: According to Newton’s second law, the sum forces acting on a mass m placed on elevator, which is…

Q: A kid in a wagon rolls from rest down a hill and reaches the bottom at 12 m/s. On the next run she…

A: From kinematics equation, the formula for the velocity is: Since the wagon roll is not experiencing…

Q: Find the speed of the object when its height is 100 m.

A: As per our guidelines we can only answer a maximum three sub-parts at a time. Please resubmit the…

Q: All heights given below are measured from the ground which is assumed to be h=0. How fast does the…

A:

Q: Consider two balls thrown separately from the top of a 50 m tall cliff. Ball 1 is thrown straight up…

A:

Q: trebuchet releases its 90 kg stone projectile 5 m above the ground, at an ngle of 35, and with a…

A: Motion of projectile can be divided into x component and y component.

Q: A 0.1 kg apple hits the ground with a speed of 17 m/s. From what height was the apple dropped? I am…

A: Given  Mass(m) = 0.1 kg  Speed at the ground (v) = 17 m/s  Let , initial height of apple is 'h' .…

Q: The top of a ski hill sits at an altitude of 2000 m. If you were to "Frenchfry" (go straight down…

A: Here, we have to Use Conservation of energy As difference in altitude is given, we just have to…

Q: At the Earth's surface, a projectile is launched straight up at a speed of 7.7 km/s. To what height…

A: Given,  Speed = 7.7 km/s We need to calculate,  Height =?

Q: Two planets of mass 2 x 1025kg are release from rest 9.0 x 1012 m apart. What is the speed of the…

A:

Q: Calculate the speed of the object when it is at x=2m (b) Does the object reach x=3m ? ____ Yes ____…

A: As this question has multiple parts so I have solved only the first 3 parts. If you need solution of…

Q: A girl jumps upward off a trampoline with a speed of 3.6 m/s. How high will she rise? Ignore air…

A: Given data:  Initial velocity (u) = 3.6 m/s, upward Air resistance is negligible Required: The…

Q: In a downhill ski race, surprisingly, little advantage is gained by getting a running start. (This…

A: Distance= 64.0 m Angle (θ) = 29°

Q: You shoot a ball straight up with an initial speed of 8490 m/s. When it reaches a height of 4.0 x 10…

A: Given, v0=8490 m/sh=4.0×106 m

Central Force

Central force is the force that acts along the center of mass of one body to the center of mass of another body. Its direction from or away from a point on a body to another is called the center of the force. Such forces include gravitational force between two massive objects or electrostatic forces between two charged particles. So from atoms to planets, the central forces play an important role in shaping our daily lives. One of the remarkable features of central forces is that they are conservative, i.e. the total energy of a central force system can always be expressed as a gradient of a potential energy function.