A 0.03kg bullet is fired vertically at 200m/s into a 0.15kg baseball that is initially at rest. The bullet lodges in the baseball and, after the collision, the baseball/bullet rise to a height of 37m. (a). What was the speed of the baseball/bullet right after the collision? (b). What was the average force of air resistance while the baseball/bullet was rising?
 👍
 👎
 👁
 ℹ️
 🚩
1 answer

(a) The actual speed V' of the bullet/ball combination after impact can be obtained by applying conservation of momentum.
m*200 = (m+M) V'
V' = (0.03/0.018)*200 = 33.3 m/s
If there were no air resistance, the ball and bullet would rise to a height H given by
(m+M)gH = (1/2)(m+M)V'^2
H = V'^2/(2g) = 56.7 m
Since it only rose 37 m, 19.7/56.7 = 34.7% of the ball/bullet's initial kinetic energy is lost due to air friction. That would be
(1/2)(m+M)*V'^2*(0.347)
= 34.6 Joules
Set that energy loss equal to Fav*37 m to get the average air friction force, Fav = 0.936 Newtons 👍
 👎
 ℹ️
 🚩
answered by drwls
Answer this Question
Related Questions

Physics
An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height (Fig. P6.26). The bullet remains in the block, and after the impact the block lands 2.00 m from the bottom of the table. Determine the initial
 asked by having trouble
 21,005 views

Physics
A gun is accurately aimed at a dangerous criminal hanging from the gutter of a building. The target is well within the gun’s range, but the instant the gun is fired and the bullet moves with a speed v(sub0) , the criminal lets go and drops to the ground.
 asked by Esora
 1,699 views

Please Check My Work: College Physics
Determine the minimum angle at which a roadbed should be banked so that a car traveling at 20 m/s can safely negotiate the curve if the radius of the curve is 200m. * Data: v=20 m/s r=200m *Formula TAN(theta)=v^2/rg *Solution TAN(theta)=(20
 asked by Jose Luis
 7,611 views

physics
a 15g bullet is fired from a rifle. it takes 2.50 * 10^3s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 715 m/s. assuming that the acceleration of the bullet is constant, find the average net force exerted on
 asked by courtney
 5,702 views

Physics
What is the acceleration of a projectile fired vertically upwards? Is it positive or negative? Vertically downwards?
 asked by amanda1012
 1,579 views

Physics
A bullet is ﬁred straight up from a gun with a muzzle velocity of 259 m/s. Neglecting air resistance, what will be its displacement after 8.9 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m. Please show work
 asked by Eren
 935 views

Physics
What is the range of a bullet fired horizontally at a height of 1.5 m with an initial velocity of 120 m/s A) 9.8 m/s^2 B) about 0.55 s C) about 66.4 m D) not enough info I think it’s not enough info (D) because I don’t know how to solve this Can
 asked by CHEESE🧀
 645 views

Physics
A bullet mass of 0.05kg is fired horizontally into a 10kg block which is free to move with velocity of 0.5m/s after the impact. Find the velocity with which the bullet hits the body
 asked by Blessing
 395 views

Physics 2
A 10 g bullet is fired into, and embeds itself in, a 2 kg block attached to a spring with a force constant of 19.6 n/m and whose mass is negligible. How far is the spring compressed if the bullet has a speed of 300 m/s just before it strikes the block and
 asked by Dee
 3,846 views

Physics
A 2.50g bullet, traveling at a speed of 425m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 270g (a) find the speed of the bullet/block combination immediately after the collision (b) how high does the combination rise above
 asked by CJ
 5,108 views

physics
A 32 kg gun is standing on a frictionless surface. The gun fires a 55.1 g bullet with a muzzle velocity of 320 m/s. The positive direction is that of the bullet. Calculate the momentum of the bullet immediately after the gun was fired. Answer in units of
 asked by Jackie
 1,162 views

physics
For a ballistics study a 1.9 gram bullet is fired into soft wood at 380 meters/sec and penetrates 15 cm. a.) find the retarding force (resistance) in N. b.) the time needed to stop the bullet in sec. c. acceleration of the bullet in meters/sec.
 asked by Janus
 1,667 views

Physics
A sniper fires a bullet at 120 m/s at 30° above the horizontal from the roof top of a 35 m high parking garage. If the bullet strikes the level ground beside the parking garage: a) How long was the bullet in the air? b) How far from the base of the
 asked by Corey Brown
 2,698 views

Physics
A small wooden block with mass 0.800kg is suspended from the lower end of a light cord that is 1.52m long. The block is initially at rest. A bullet with mass 0.0126kg is fired at the block with a horizontal velocity v0. The bullet strikes the block and
 asked by Katie
 5,572 views

Physics
a 100 gram bullet is fired from a 10 kg gun with a speed of 1000m/sec. what is speed of recoil
 asked by Devin Darkie
 2,489 views

Kinematics
A bullet is fired horizontally from a height of 45 m and hits the ground 2000 m away. With what velocity does the bullet leave the fun?
 asked by Eva
 1,329 views

Math  check answer
A rifle bullet is fired directly upward from the ground. Its height above the ground at any instant of time t is given by the formula, s = 63t  9.8t2. Assuming there is no air resistance how high will the bullet rise? height in meters = My Answer S'=
 asked by Brownie
 931 views

physics
A miniature springloaded, radiocontrolled gun is mounted on an air puck. The gun's bullet has a mass of 5.00 g, and the gun and puck have a combined mass of 120 g. With the system initially at rest, the radio controlled trigger releases the bullet
 asked by nur
 2,425 views

Physics
A gun is fired parallel to the ground. At the same instant, a bullet of equal size and mass next to the muzzle is released and drops to the ground. Which hits the ground first and why? I think that the bullets will hit the ground at the same time because
 asked by Anonymous
 1,482 views

Physics, newtons laws
A bullet is fired with a certain velocity at an angle above the horizontal at a location where g= 10.0 m/s^2. The initial x any components of its velocity are 86.6 m/s and 50 m/s respectively. How long does it take before the bullet hits the ground?
 asked by Naf
 2,414 views
Still need help?
You can ask a new question or browse existing questions.