1. L

    distance travelled byparachute in terminal velocity

    Hi so I'm calculating the distance travelled by a payload attached to a parachute. I have calculated the terminal velocity and then drag force. I need to find the descent time so that I can use it to find distance travelled in the horizontal direction. so I used the formula: t=sqrt(2H/g) but...
  2. H

    Use Conservation of energy to solve projectile motion

    Hello, I’m working on this homework problem and am having trouble finding a way to explicitly solve for initial velocity. I got a hint from my professor that the final point should be at the top of the parabola, but I may have misunderstood him. We solved this using kinematics when we were on...
  3. N

    Projectile Motion Problem with no Velocity given

    Problem is Linked with a graphic I drew. Thanks!
  4. L

    Projectile motion: Missile over a hill

    A missile is to be launched from a point P, 500m from the peak of a hill of height 2000m into enemy territory. If the missile is to just pass over the hill and strike a target 1200m from P, what is the velocity at which the missile should be launched, and the angle of launch?
  5. J

    Wave motion on a string

    I have a rather elementary question. Let's say I have an arbitrarily long string, tied at both ends, with enough tension on the string so it is a medium for wave motion from one end to the other. I inject a disturbance at one end, to initiate a set of waves towards the other end. Almost...
  6. R

    Simple Harmonic Motion

    Please any help to solve this problem ? could any body help me to draw the shape of the movement ? or the free body diagram of the bead? Thanks in advance .
  7. V

    Harmonic motion with spring moving with constant speed

    A spring whose constant is $k$ has its left end joined to a mass $m$ while its other end is always moving whith constant speed $u$. The coefficient of kinetic friction between the mass and the horizontal surface is μ and the coefficient of static friction is 2μ. The mass can carry out harmonic...
  8. C

    Newtons laws of motion

    A rope pulls a box of mass 2 kg along a horizontal floor with a constant speed. The friction force opposing the motion is 12 N to the left. Determine the magnitude and direction of the force pulling the box. Is it 12 N to the right because of N's 3rd law?
  9. M

    Question about Force, Motion and Friction

    I have a problem with this question: A skip of mass 2 tonnes has to be dragged along a track. The coefficient of friction is 0.7. A cable attached to the skip runs horizontally to a winch powered by an electric motor. Using the controls on the motor, the tension in the cable is gradually...
  10. H

    Laws of Motion: Recoil Acceleration?

    Hi everyone, I have NO CLUE how to even start this problem! Please help! If a 1100kg artillery shell is fired from a 100,000kg battleship with an acceleration of 2000m/s^2, then what is the recoil acceleration of the ship?
  11. H

    Angle of space motion and radial-velocity vector

    Hello So I am trying to figure out the angle of a space motion vector with its radial velocity vector. I have to sample equations, but despite plugging in the numbers I am not getting the same answers. So I have: tan-1((4.74d(u")/(vr)) With: d = 5.14 pc u" = 0.66092" vr = -26.3km s-1...
  12. avito009

    What inspired newton to formulate his laws of motion?

    Well Pmb used to say that you should try to investigate how laws of physics were formed. So as per my thinking newton formulated his laws based on law of conservation of energy. Is this correct? Let me elaborate. Newtons first law states that an object at rest remains at rest and object in...
  13. P

    Motion in One Dimesion: The tortoise and the Hare Race Kinematics

    A turtle and a rabbit engage in a footrace over a distance of 4.00km. The rabbit runs 0.500km and then stops for a 90min nap. Upon awakening, he remembers the race and runs twice as fast. Finishing the course in a total time of 1.75h, the rabbit wins the race. A) Calculate the avg speed of...
  14. GatheringKnowledge

    Light Clocks and Relative Motion

    I have couple questions about the time, measured by 2 light clocks in a frame, which moves at a constant velocity - where one clock is perpendicular and second one is parallel to the direction of motion...
  15. J

    Is uniform circular motion an example of SHM?

    I realise a projection of an object doing UCM appears as SHM, but does UCM object meet the criteria of a type of SHM? Thanks
  16. R

    Parabolic motion to reach certain point what is the formula to specify the correct v0y and v0x to reach the red point and x max?
  17. R

    projectiles, independence of horizontal and vertical motion

    Hi All I know there is a nice experiment where you project a 'bullet' horizontally and drop one at the same time, the two land at the same time. This demonstrates the independence of horizontal and vertical motion and allows us to separate the motion when working on projectile problems...
  18. N

    Energy in rotational motion

    A frictionless pulley has the shape of a uniform solid disk of mass 2.50 kg and radius 20.0 cm. A 1.50-kg stone is attached to a very light wire that is wrapped around the rim of the pulley, and the system is released from rest. (a) How far must the stone fall so that the pulley has 4.50 J of...
  19. V

    Projectile Motion - Hitting a Sloped Wall

    Question: In the figure, a ball is launched with a velocity of magnitude 7.00 m/s, at an angle of 43.0° to the horizontal. The launch point is at the base of a ramp of horizontal length d1 = 6.00 m and height d2 = 3.60 m. A plateau is located at the top of the ramp. (a) Does the ball land on...