If you fire a bullet at a speed vi,bullet = 400 m/s into a wooden block of mass 0.2 kg, and after the bullet embeds in the wood, the velocity of the bullet and block together is 7.8 m/s. What is the mass of the bullet?
4 g |
6 g |
2 g |
0.2 kg |
What is conservation of momentum a special instance of?
Newton's 2nd law, the momentum principle |
Newton's 1st law, the inertia principle |
Newton's 3rd law, the reciprocity principle |
Conservation of energy |
If you fire a bullet at a speed vi,bullet = 400 m/s into a wooden block...
A bullet with some mass, m, and initial speed, vi, collides with a wooden block of mass M that is hanging at the end of a light rope. The bullet imbeds itself in the block and the block and bullet swings upwards reaching a maximum height of h above the initial point of the collision. a. A scientist can measure the masses and the height, show that the initial speed can then be calculated from the following equation: vi= (m+M)/m×root...
A bullet of mass Mb is fired horizontally with speed Vi at a wooden block of mass Mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed Vf . 1)Which of the following best describes this collision? a)perfectly elastic b)partially inelastic c)perfectly inelastic 2) Which of the following quantities, if any, are...
A bullet of mass 8 g is fired into a 1.2 kg ballistic pendulum (a block of wood acting as the pendulum bob of a thin metal arm attached to a low friction pivot point) that is initially at rest. The bullet exits the block of wood with a speed of 180 m/s and the wooden block swings from its lowest point to a maximum height of 9.2 cm above that location. Determine the velocity of the bullet before it...
One can measure the speed v of a bullet by using a ballistic pendulum. Let the mass of the bullet m-15g. The mass of the wooden pendulum is M-7 kg. The bullet is shot, and the system made of Wood + Bullet start swinging with an initial velocity V upward, as much as h-5 cm. a) (15 p) Via using the law of energy conservation and the law of linear momentum conservation, find the initial velocity of the bullet, in...
mass One can measure the speed v of a bullet by using a ballistic pendulum. Let the mass of the bullet m=15g. The of the wooden pendulum is M=7 kg. The bullet is shot, and the system made of Wood + Bullet start swinging with an initial velocity V upward, as much as h=5 cm. a) (15 p) Via using the law of energy conservation and the law of linear momentum conservation, find the initial velocity of the bullet, in...
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A bullet with mass m = 40 grams traveling at v = 400 m/s strikes a block of wood suspended from a ceiling with a massless cord. The collision last for 15 milliseconds, and after it is completed the bullet embeds itself into the block. Then, the combined system rises to a maximum height has its swings upward as shown. The mass of the wooden block is M=5.0kg and the length of the cord is L = 1.25 m. Calculate...
A 3.00 g bullet moving at 115 m/s strikes a 50.0 g stationary wooden block and embeds itself in the block. The bullet is made of lead, and the specific heat of lead is 128 J/(kg · °C). Assume the thermal energy generated in the collision is equally distributed in the bullet and the block. (a) Calculate the rise of temperature (T) of the bullet if block is clamped in place so that it cannot move. (b) Calculate the rise...
A 35.0 g bullet strikes a 5.5 kg stationary wooden block and embeds itself in the block. The block and bullet fly off together at 7.0 m/s. What was the original speed of the bullet?
A bullet of mass 0.017 kg traveling horizontally at a high speed of 210 m/s embeds itself in a block of mass 4 kg that is sitting at rest on a nearly frictionless surface. (a) What is the speed of the block after the bullet embeds itself in the block? Vf = m/s ) Calculate the total translational kinetic energy before and after the collision. Ktrans,i = Ktrans,f = (c) Compare the two results and explain why there is a...