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A 60grm bullet fired from a 5kg gun leapes with a speed of 500msfind the speed with whitch the gun recoils?
The momentum of the bullet is equal and opposite to the momentum of the gun. Momentum = mv. Bullet =mbvb Gun = mgvg These are equal, with their speeds in opposite directions. mbvb = mgvg vg = vb x mb/mg = vb x (60/5000) = 0.012 vb The recoil speed of the gun is 0.012 the muzzle speed of the bullet. The question says vb is "500ms", which is unclear. If it is meant to indicate "500 meters per second", then the recoil speed is (500 x .012) = 6 m/s.
How does a laser measure the speed of a car?
A laser speed gun emits a pulse of light towards a moving vehicle. By measuring the time it takes for the light to hit the vehicle and bounce back, the speed gun can calculate the speed of the car based on the change in distance over time.
How can you measure the speed of the train while standing on the platform with a device?
You can use a radar gun or a speed measuring app on a smartphone to measure the speed of the train while standing on the platform. These devices work by emitting signals that bounce off the train and calculate the speed based on the Doppler effect.
Why is the speed of a recoiling gun less than the speed of the fired bullet?
Newton said "For every action, there is an equal and opposite reaction." The action is pushing the bullet in one direction. Reaction is the gun being pushed in the other. The energy is speed times mass. The gun masses much more than the bullet, and so will move proportionately slower than the bullet. Which is a very good thing- or the recoil of the gun would kill the shooter.
Stationary point that is used for speed measurement?
A radar gun is commonly used to measure the speed of a moving object. The radar gun emits a radio wave that bounces off the object and returns to the gun, allowing it to calculate the speed based on the frequency shift of the returned wave. This stationary point can be used by law enforcement for monitoring traffic speeds or by sports officials to measure the speed of a ball or athlete.
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