From the attached diagram, determine (a) frictional force (b) acceleration of the system (c) tension in the string (d) net force acting on the 2 dg block. The coefficient of friction is 0.4.
"A runner hopes to complete the 10,000-m run in less than 30.0 minutes. After exactly 27.0 minutes, there are still 1100 m to go. The runner must then accelerate at 0.20 m/s^2 for how many seconds in order to achieve the desired time?" Here's what I've done: So far, the runner has gone 8900 m in 1620 s, which should give h
"A sprinter accelerates from rest to 10.0 m/s in 1.35 seconds. What is her acceleration in (a) m/s^2, and (b) km/h^2?" I got (a) right. Acceleration = 10/1.35 = 7.41 m/s^2. But I somehow screw it up when I go to do the conversion. Here's what I did: 10 m = 0.01 km 1.35 s = 3.75 x 10^-4 hr (1.35 x (1 hr/3600 s) So the s
At what minimum speed must a roller coaster be traveling when upside down at the top of a circle if the passengers are not to fall out? Assume a radius of curvature of 9.27 m.
See attached file for the graph. In the figure below, m1 = 10.7 kg and m2 = 4.15 kg. The coefficient of kinetic friction is 0.271. If the system is set in motion with m2 moving downward, what will be the acceleration of the system? I'm not sure how to factor in the coefficient of kinetic friction. Can you show me how to do
A firefighter, 48.2 m away from a burning building, directs a stream of water from a ground level fire hose at an angle of 32.8 degrees above the horizontal. If the speed of the stream as it leaves the hose is 40.1 m/s, at what height will the stream of water strike the building?
See attached drawing in Word file. Please give me a step by step rundown of how to do it? "A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge H = 227 m below. If the plane is traveling horizontally with a speed of 223 km/hr (61.9 m/s), how far in advance of the recipients (horizontal dista
"A fugitive tries to catch a freight train traveling at a constant speed of 5.95 m/s. Just as an empty box car passes him, the fugitive starts from rest and accelerates at 3.84 m/s^2 to his maximum speed of 8.23 m/s. How long does it take him to reach the empty box car?"
"A car accelerates from rest and travels for 4.98 s with a uniform acceleration of +1.50 m/s^2. The driver then applies the brakes, causing a uniform acceleration of -1.99 m/s^2. If the brakes are applied for 3.06s, how fast is the car going at the end of the braking period? And how far has the car gone?"
Hi. Here's my problem: "A tennis ball with a speed of 11.8 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 8.51 m/s. If the ball is in contact with the wall for 0.00175 s, what is the average acceleration of the ball while it is in contact with the
Please help with the following problem. A force F applied to an object of mass m1 produces an acceleration of 3.00m/s^2. The same force applied to a second object of mass m2 produces an acceleration of 1.00m/s^2. (a) What is the value of m1/m2?.........I understand that a2/a1=1/3 --answer (b) If m1 and m2 were combine
A.) A wedge with mass M rests on a frictionless horizontal tabletop. A block with mass m is placed on the wedge. There is no friction between the block and the wedge. The system is released from rest. Calculate: i) the acceleration of the wedge ii) the horizontal and vertical components of the acceleration of the block.
View attachment I would like detail easy to understand answers , and if u need a drawing ( figure ) for the problem email me , i will email you back if i have a drawing. Thank you
SEE ATTACHMENT #1 for a diagram showing parameters. A crate rests on a truck which is traveling at speed V= 26 m/sec down a hill inclined at angle b= 8 degrees. The coefficient of friction between crate and truckbed is f= .50. Find the shortest stopping distance such that the crate does not slide forward.
A man sitting in a cage is connected to a pulley system of three movable and one fixed pulley in the system shown in ATTACHMENT #1. He pulls down on a rope as shown, to raise himself and the cage. The man and cage have a total weight of 639 nt. Ignore friction as negligible. PART a. Find the force he exerts to move upward
SEE ATTACHMENT #1 for a diagram showing parameters. A box whose mass is 5 kg is on a frictionless horizontal surface. A force P is applied to the box in a direction 25 degrees above horizontal. PART a. Find the maximum value of P for which the box stays in contact with the floor. PART b. Find the acceleration when this
SEE ATTACHMENT #1 for a diagram showing known parameters. An antitank gun with initial velocity Vo= 240 m/sec at +10 degrees is located on top of a tower 60 m above ground. A tank is initially at rest, 2200 m from the base of the tower on the level ground. At time t=0, the tank crew sees the gun and begins to accelerate at .9
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.