A soldier is holding a machine gun, which is firing horizontally at rate N rounds/minute. The...
A soldier is holding a machine gun, which is firing horizontally at rate N rounds/minute. The mass of each bullet is m, and the velocity of each bullet is v when it leaves the gun. What is the average horizontal force the soldier needs to exert to this gun?
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A soldier is holding a machine gun, which is firing horizontally
at rate N rounds/minute. The...
A dart gun includes a spring of spring constant k = 18 N/m which is used...
A dart gun includes a spring of spring constant k = 18 N/m which is used to shoot a dart of mass m. The dart leaves the gun at a speed of v = 4.1 m/s after the spring is compressed 1 cm. What is the weight, Fg in Newtons, of the dart? Part (b) What is the dart’s speed when it hits the floor vf, in m/s, if it is fired horizontally at a height of h = 2...
The lumberjack and his log Jack, the lumberjack, mass mj, is standing on his favorite log,...
The lumberjack and his log Jack, the lumberjack, mass mj, is standing on his favorite log, mass mi, which is floating motionless on the lake. He starts running on the log, reaching a speed of vJJL- 3 m/s, the subscript indicating that it is measured with respect to the log. What is Jack's speed with respect to the shore vjs? Hint: Use Galilean velocity transformations In peace... A cannon is firing shells of mass m, at a muzzle velocity v...
1. A gun fires a shell of mass 8 kg in a horizontal direction with a...
1. A gun fires a shell of mass 8 kg in a horizontal direction with a velocity of 375 m-s. The mass of the gun is 2 t and the shell takes 0.012 s to leave the barrel. Calculate the velocity of recoil and the average force on the gun. 2. Two men, one of mass 80 kg and the other 60 kg, sit facing each other in two light boats and holding the ends of a rope between them....
A cannon is fired horizontally. Before the firing, the cannon (which is mounted on a massive...
A cannon is fired horizontally. Before the firing, the cannon (which is mounted on a massive wooden base) was initially at rest on a flat, icy, surface; any friction between the base of the cannon and the ice is small enough to be ignored. Just after the explosion in the cannon barrel, the shell (with a mass of 3.3 kg) is moving through the barrel of the gun with a speed of 2450 m/s. At that same instant of time,...
THE EXPERIMENT The speed "." of a ball as it leaves the spring gun will be...
THE EXPERIMENT The speed "." of a ball as it leaves the spring gun will be measured by projecting the ball horizontally (0-0) from a table top at a distance H above the floor. The gun is then elevated at a known angle 8. The position of the target is calculated using the measured value of v. calculated time of flight, and the equations of motion. A successful prediction with the projectile hitting the target means that the following concepts...
The spring of a spring gun has force constant k = 400 N/m and negligible mass....
The spring of a spring gun has force constant k = 400 N/m and negligible mass. The spring is compressed 6.00 cm and a ball with mass 0.0300 kg is placed in the horizontal barrel against the compressed spring. The spring is then released, and the ball is propelled out the barrel of the gun. The barrel is 6.00 cmlong, so the ball leaves the barrel at the same point that it loses contact with the spring. The gun is...
Part A: A machine gun fires 55.8 g bullets at a speed of 750 m/s. The...
Part A: A machine gun fires 55.8 g bullets at a speed of 750 m/s. The gun fires 182 bullets/min. What is the average force the shooter must exert to keep the gun from moving? Answer in units of N. Part B: What is the momentum of a two-particle system composed of a 1000 kg car moving east at 50 m/s and a second 1000 kg car moving west at 85 m/s? Let east be the positive direction. Answer in...
In a ballistics test, a 25 g bullet traveling horizontally at 1200 m/s goes through a...
In a ballistics test, a 25 g bullet traveling horizontally at 1200 m/s goes through a 45 cm thick 350 kg stationary target and emerges with a speed of 1000 m/s. The target is free to slide on a smooth horizontal surface. (a) How long is the bullet in the target (assume constant acceleration)? s What average force does it exert on the target? N (magnitude only) (b) What is the target's speed just after the bullet emerges?
The spring of a spring gun has force constant k = 450 N/m and negligible mass....
The spring of a spring gun has force constant k = 450 N/m and negligible mass. The spring is compressed 6.40 cm and a ball with mass 0.0270 kg is placed in the horizontal barrel against the compressed spring. The spring is then released, and the ball is propelled out the barrel of the gun. The barrel is 6.40 cm long, so the ball leaves the barrel at the same point that it loses contact with the spring. The gun...
U ed 20. Gun play. A toy dart gun launches a 111-gram rubber dart by releasing...
U ed 20. Gun play. A toy dart gun launches a 111-gram rubber dart by releasing a compressed spring. If the spring constant is 239 N/m and the spring is compressed 6.00 cm before firing, how much elastic potential energy is stored in the spring? Use the work-energy theorem to calculate the the horizontal launch velocity of the dart. A second dart gun launches the same dart at 2.67 m/s when compressed 7.25 cm. What is the spring constant of...
The lumberjack and his log Jack, the lumberjack, mass mj, is standing on his favorite log, mass mi, which is floating motionless on the lake. He starts running on the log, reaching a speed of vJJL- 3 m/s, the subscript indicating that it is measured with respect to the log. What is Jack's speed with respect to the shore vjs? Hint: Use Galilean velocity transformations In peace... A cannon is firing shells of mass m, at a muzzle velocity v...
A cannon is fired horizontally. Before the firing, the cannon (which is mounted on a massive wooden base) was initially at rest on a flat, icy, surface; any friction between the base of the cannon and the ice is small enough to be ignored. Just after the explosion in the cannon barrel, the shell (with a mass of 3.3 kg) is moving through the barrel of the gun with a speed of 2450 m/s. At that same instant of time,...
THE EXPERIMENT The speed "." of a ball as it leaves the spring gun will be measured by projecting the ball horizontally (0-0) from a table top at a distance H above the floor. The gun is then elevated at a known angle 8. The position of the target is calculated using the measured value of v. calculated time of flight, and the equations of motion. A successful prediction with the projectile hitting the target means that the following concepts...
U ed 20. Gun play. A toy dart gun launches a 111-gram rubber dart by releasing a compressed spring. If the spring constant is 239 N/m and the spring is compressed 6.00 cm before firing, how much elastic potential energy is stored in the spring? Use the work-energy theorem to calculate the the horizontal launch velocity of the dart. A second dart gun launches the same dart at 2.67 m/s when compressed 7.25 cm. What is the spring constant of...
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