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Acceleration

Atwood machine & rotating rods questions

The first question involves an atwood machine, the second involves two different rods attached to hinges falling/rotating to the ground. See the jpeg for exact questions. The text is provided below simply for the benefit of the search engine: Atwood Machine A frictionless pulley with mass Mb is attached to the ceiling,

Mass of Planets, Gravitational Acceleration and Period of a Pendulum

Find the mass and the radii of the planets Mercury, Neptune and Pluto, masses in kilograms and radii in meters. With that data calculate the gravitational acceleration on each of the planets in kilograms and meters and show the gravitational acceleration in meters per square second. With the gravitational acceleration from abo

Stone launched vertically upward from top of cliff

1) Luigi launches a stone vertically upward from the top of a cliff. The height of the stone above the base of the cliff is appoximated by the model h=65+10t-5t^2 where t is time in second and h is height in metres a) how high is the stone above the base of the cliff after 3 seconds? h = 65 + 10t - 5t^2 h = 65 +10(3) -

Physics

1) In the drawing the rope and the pulleys are massless and there is no friction Find a) the tension in the rope, and b) the acceleration of the 12kg block. (The 12 kg block is on the table connected to a 3 kg block which is hanging off the table by a pulley) 2) A chain consisting of five links, each of mass 0.10k

Amplitude of weightlessness

An ant with mass is standing peacefully on top of a horizontal, stretched rope. The rope has mass per unit length and is under tension . Without warning, Throckmorton starts a sinusoidal transverse wave of wavelength propagating along the rope. The motion of the rope is in a vertical plane. What minimum wave amplitude will

Calculatin Angular Acceleration

Question: An ice skater rotates 2 revolutions per second. She puts her feet on the ground to generate a friction force so that she stops rotating in 20 sec. What is the angular acceleration in rad/s^2. How many rotations did the ice skater make before stopping?

Value of gravitational acceleration on moon

A pendulum of length 2 meters is taken to the moon. if this pendulum makes 10 oscillations in 32.0 seconds, what is the value of gravitational acceleration on this moon? a. 3.86 m/s^2 b. 2.54 m/s^2 c. 7.71 m/s^2 d. 9.86 m/s^2

Centripetal Acceleration

A centrifuge rotor is accelerated from rest to 20,000 rpm in 5.0 min: (a) What is the current angular speed (omega) in rad/sec? (b) What is the angular acceleration (alpha)rad/sec^2? (c) If the centrifuge is modeled as a cylinder of radius 0.10 m and mass 2.0 kg, what torque is applied to make it spin?

Uniform Circular Motion and Centripetal Acceleration

An ultracentrifuge operates at a speed of 5.00x10^6 rpm. It contains test tubes filled with viruses. (a) what is the centripetal acceleration on a virus at a radial distance of 4.00 cm from the centrifuge's axis of rotation? (b) How does this acceleration compare with g, the acceleration due to gravity?

Uniform Circular Motion and Centripetal Acceleration

The Moon revolves arond the earth in 27.3 days in a nearly circular orbit with a radius of 3.8 x 10^5 km. Assuming that the Moon's orbital motion is a uniform circular motion, what is the Moon acceleration as it "falls" toward the earth?

Linear Momentum and Collisions - Acceleration and Time

A horizontal force of 100 N is applied to a 50.0 kg box; the box slides on a level floor and is opposed by frictional force of 20 N. Show the algebraic steps a) What is the acceleration of the box? b) How long does it take to move 5.0 meters? c) What is its speed at this point (5.0 meters)?

Resultant force and work

The speed of a 4Kg object is given by v=(2t)m/s,where t is in seconds. At what rate is the resultant force on this object doing work at t=1 second?

Kinetic Friction and Tension in a String

A 9 kg hanging weight is connected to a string over a pulley to a 5Kg block that is sliding on a flat table. If the coefficient of kinetic friction is 0.15, find the tension in the string.

Dynamics : Air Resistance and Forces on a Falling Pebble

A person stands on the edge of a cliff and throws a pebble of mass 0.02kg vertically upwards with speed 10m/s. At the instant it is released, the pebble is 50m above sea level. On its return, the thrower does not catch the pebble, which continues past and falls into the sea... (i) Modelling the pebble at a particle and ignoring

Basic Physics: Velocity; Acceleration; Force

Attached are physics questions relating to velocity, acceleration, force etc. Example: A 32.9kg boy and a 59.0kg girl are on the surface of a frozen lake, 13.5m apart. Using a rope, the boy exerts a horizontal 4.15N force on the girl, pulling her toward him. Calculate the magnitude of the boy's acceleration.

KINETIC FRICTION

A BOX IS SLIDING UP AN INCLINE THAT MAKES AN ANGLE OF 16 DEGREES W/ RESPECT TO THE HORIZONTAL. THE COEFFECEINT OF KINETIC FRICTION BETWEEN THE BOX AND THE INCLINE IS 0.18. THE INITIAL SPEED OF THE BOX AT THE BOTTOM OF THE INCLINE IS 3.0 M/S. HOW FAR DOES THE BOX TRAVEL UP THE INCLINE BEFORE COMING TO REST?

KINETIC FRICTION

A 3.8KG BOX IS SLIDING ACROSS THE HORIZONTAL FLOOR OF AN ELEVATOR. THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE BOX AND THE FLOOR IS 0.470. DETERMINE THE KINETIC FRICTIONAL FORCE THAT ACTS ON THE BOX FOR EACH CASE. THE ELEVATOR IS STATIONARY THE ELEVATOR ACCELERATES UPWARDS AT 2.0 M/S2 THE ELEVATOR ACCELERATES DOWNWARD A

String tension

Two masses of 3.5 kg each, connected by a string, slide down a ramp making an angle of 34 deg. with the horizontal. The coefficient of kinetic friction between m1 and the ramp is .33. The coefficient of kinetic friction between m2 and the ramp is .18. I know my acceleration is 3.41 m/s^2. How do I determine the tension of

Dynamics Problem - Torque and Angular Acceleration

A slender rod of mass Mr has a disk of mass Mo fastened to it at its end. It is pinned at 0 - a "frictionless" pin. The circular frequency in rad/s of the system for small oscillations is what? *Please see attachment for diagram, figures and multiple choice answers; please show your work.

Tension of a String

See attached diagram. A van accelerates down a hill going from rest to 32.8 m/s in 5.49 s. During the acceleration, a toy (m=0.115 kg) hangs by a string from the van's ceiling. The acceleration is such that the string remains perpendicular to the ceiling. How do you find the tension of the string?

Acceleration and direction

A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.790 of the person's regular weight. 1) Calculate the acceleration of the elevator 2) Find the direction of the acceleration Positive y-axis points UP.

Calculating magnitude of tension and acceleration

Please see the attachment for the diagrams. Explain how to breakdown the problems. 12. A 2.6 kg mass, m2, on a 33.6 degree incline is connected to a 4.2 kg mass, m1, on a horizontal surface. The surfaces and the pulley are frictionless. If F = 31.9 N, what is the magnitude of the tension in the connecting cord? 13. Two ma

Spring Scales

Please see the attachment for the diagrams. 13. Now two forces are applied to the cart with two different spring scales as shown below. The spring scale Fa still reads 10.5 N. The cart now moves toward the right with an acceleration toward the right of 2.50 m/s^2. What does spring scale Fb read? Show your calculations, and

Graphing Force versus Time

Could you please provide a force vs. time graph for the following: a) a car moves away from the origin with constant velocity b) car moves tward the orgin with constant velocity c) moves away from origin is a steady decreasing velocity d) moves away from the origin, speeds up, then slows down e) toward to ori

Acceleration of a Suitcase Being Pulled

A passenger is pulling on the strap of a 17.8 kg suitcase with a force of 68.9 N. The strap makes an angle of 35.7 degrees above the horizontal. A 38.6 N friction force opposes the motion of the suitcase. Calculate the acceleration of the suitcase.