A train, initially stationary, has a constant acceleration of 0.5m/s squared. What is its speed after 15s? What would be the total time it would take to reach a speed of 25m/s?
As a baseball is being thrown, it goes from 0 to 40m/s in 0.15s. What is the acceleration of the baseball? Please show the work.
SEE ATTACHMENT #1 for a diagram of initial conditions. Spacecraft A is initially 120 m from spacecraft B, moving towards each other on parallel paths. Both spacecrafts apply reverse thrust to reverse their motion after which they meet twice. Spacecraft A has initial velocity VoA= +25 m/sec and acceleration aA= -3 m/sec^2. Spa
See attached file. A moving point has constant acceleration along an x axis. The graph shown as ATTACHMENT #1 shows the graph with certain known information listed. Find the equation of the line, x(t), from the given known points.
A rock is thrown upward from ground level with initial upward velocity of 25 m/sec. The rock falls back down into a hole and strikes the bottom 35 meters below the ground surface. Find the maximum height reached and the total flight time.
A balloon is descending with a constant acceleration "a" less than 'g' weight of the balloon with the basket and the contents is W. What weight m of the basket should be released so that the balloon will begin to accelerate upwards with constant acceleration 'a' ? Neglect air resistance.
SEE ATTACHMENT #1 for a diagram showing parameters. On a frictionless table, mass M is attached to the free end of a spring whose force constant is k. The free end is located at the origin of an x axis. The other end of the spring is fixed. Now the mass is moved toward +x to position the free end at xm, and at that point is r
See attached file. On an inclined plane at angle b from horizontal, a frictionless block, mass m, is placed behind and in contact with a uniform cylinder of radius R and mass M. Released from rest, the two objects remain in contact as the block slides and the cylinder rolls down the plane. Find a, the acceleration down the p
See attached file. Mass m= 8 kg is suspended from a cord which passes over a frictionless pulley then wraps tengentially on the surface of a uniform cylinder, mass M= 12 kg radius R = .66 m, on a plane inclined at angle b= 25 degrees from horizontal. As the suspended mass descends it gives angular acceleration A to the cylind
A cord is wrapped on the surface of a uniform cylinder, of mass M=12 kg and radius R= .36 m. Released from rest with the cord vertically tangential to its surface and tied to a ceiling support, the cylinder descends with angular acceleration A as the cord unwinds from its surface. SEE ATTACHMENT FOR PICTURE OF APPARATUS. a. Fi
A uniform cylinder, mass M= 25 kg, radius R= .75 m, is mounted on a fixed, frictionless bearing. From a cord wrapped on its surface a mass m=6.4 kg descends and rotates the cylinder with angular acceleration 'A'. See attachment for picture of the apparatus. a. Find the angular acceleration of the cylinder. b. Find the tension
A child is twirling a 0.0120 kg ball on a string in a horizontal circle whose radius is 0.100 m. The ball travels once around the circle in 0.500 s. (a) Determine the centripetal force acting on the ball. (b) If the speed is doubled, does the centripetal force double? If not, by what factor does the centripetal force incre
Energy & centripetal force.Small mass slides down a circular surface, loses contact,and travels in free fall to ground impact.
Energy conservation, centripetal acceleration and force, and projectile. A circular pipe whose radius R= 10 m, has a frictionless surface. A small frictionless mass placed on its highest point, slides down to a point where it loses contact, then travels in free fall to impact on the ground. See the diagram in the attachment.
Projectile Motion: At what angle should the gun be aimed so when it is fired the target will be hit?
A hunter aim directly at a target (on the same level) 120 meters away. If the bullet leaves the gun at a speed of 250m/sec, by how much will it miss the target? At what angle should the gun be aimed so the target will be hit?
During a hockey game, a puck is given an initial speed of 12.00 m/s. It slides 54.00 m on the ice before it stops. What is the coefficient of kinetic friction between the puck and the ice?
An object of mass m is hanging by a string from the roof of an elevator. We want to compare the tension in the string to the weight of the object under various conditions. Which statements are true? (Give ALL correct answers) A) If the elevator is moving upwards, but slowing down, the tension in the string is equal to the ob
A small box of mass m is stacked on top of a large box of mass 3m. The interaction between the large box and the horizontal surface on which it slides is frictionless, but the interaction between the two boxes is NOT frictionless. The small box does not slide when a horizontal force F is applied to the large box. Which statement
Shown from the top view are six blocks that are sitting at rest on rotating turntables. All of the turntables have the same rotation rate (i.e. same frequency). The masses of the blocks and how far out from the center they sit varies. The specific values are given in the figures. Which of the following statements are true abo
There are two football players standing 48 meters apart (player A and player B). They start running towards each other. Player A acceleration is 0.5 m/s2 and player B acceleration is 0.3 m/s2. How much time passes before each player collides with each other? When they collide how far has the first player(player A) trave
The mass of an elevator is 698 kg. The tension in the cable is 9250 N. At what rate does the elevator accelerate upward?
A car is traveling on a horizontal circular track or radius equal to 22 meters. If the coefficient of static friction is 0.951, what is the maximum speed that the car can take without skidding?
Newton's Second Law acceleration of a mass on a plane connected by a cord over a pulley to a suspended rock.
A mass M= 6.2 kg on a plane inclined at angle 33° is connected by a cord parallel to the plane then over a frictionless, massless pulley to a suspended rock of mass R. The friction coefficient, µ=.25 between the mass and the plane. (See pictures in attachment File #1.) Find the mass of the rock for the following situations:
There is a hand held device with a rod with a cord attached to a spring scale on the rod. You swing the ball around in a horizontal circle with a radius of 0.500 m. There are several parts to this that I need help with. If the speed of the ball is 3.7 m/s, how do you calculate the expected tension in the cord? Why can't you s
Calculating the acceleration of each object suspended with a pulley. Diagram of pulley included in a Word document.
The system consists of 2 objects of Masses M and m and m<M suspended with ideal string over a massless, frictionless pulley. What is acceleration of each object? Please view the attachment below for a diagram.