A 3-g bullet is fired horizontally into a 10-kg block of wood suspended by a rope from the ceiling. The block swings in an arc, rising 4 mm above its lowest position. The velocity of the bullet (in m/s) was: (Use g = 9.8 m/s²) a. 800 b. 8.00 c. 658 d. 934 e. unknown since the heat generated in the collision was not given

A 3-g bullet is fired horizontally into a 10-kg block of wood suspended by a rope from the ceiling. The block swings in an arc, rising 4 mm above its lowest position. The velocity of the bullet (in m/s) was: (Use g = 9.8 m/s²) a. 800 b. 8.00 c. 658 d. 934 e. unknown since the heat generated in the collision was not given

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter3: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 96CP: A bullet of mass 10 g is traveling horizontally at 200 m/s when it strikes and embeds in a pendulum...

See similar textbooks

Similar questions

A 14.2 g bullet is shot vertically into a2.64 kg block. When the bullet penetrates the block, itcomes to rest in a time interval of 1.12 ms. The block liftsupward 9.30 mm vertically with the bullet embedded.Ignore air resistance and ignore the force of gravity duringthe 1.12 ms embedding time. Find (A) the initial kineticenergy of the bullet before the collision and (B) find the % ofthis energy lost as heat during the collision. After yourcalculations, (C) show that it was a good approximation toignore the force of gravity during the 1.12 ms it took thebullet to come to rest in the block
A 9.7-g lead bullet is fired into a fence post. The initial speed ofthe bullet is 720 m>s, and when it comes to rest, half its kineticenergy goes into heating the bullet. How much does the bullet’stemperature increase?
Superman leaps in front of Lois Lane to save her from a volley of bullets. In a 1-minute interval, an automatic weapon fires 150 bullets, each of mass 8.0 g, at 400 m/s. The bullets strike his mighty chest, which has an area of 0.75 m2. Find the average force exerted on Superman’s chest if the bullets bounce back after an elastic, head-on collision.
Superman leaps in front of Lois Lane to save her from a volley of bullets. In a 1-minute interval, an automatic weapon fires 150 bullets, each of mass 8.0 g, at 4.00 x 102 m/s. The bullets strike his mighty chest, which has an area of 0.75 m2. Find the average force exerted on Superman’s chest if the bullets bounce back after an elastic, head-on collision.
A 0.250-kg aluminum bowl holding 0.800 kg of soup at 25.0 is placed in a freezer. What is the final temperature if 388 kJ of energy is transferred from the bowl and soup, assuming the soup's thermal properties are the same as that of water?
Repeat the preceding problem with 2.00 kg of ice instead of 1.00 kg.
How many grams of coffee must evaporate from 350 g of coffee in a 100-g glass cup to cool the coffee and the cup from 95.0 to 45.0 ? Assume the coffee has the same thermal properties as water and that the average heat of vaporization is 2340 kJ/kg (560 kcal/g). Neglect heat losses through processes other than evaporation, as well as the change in mass of the coffee as it cools. Do the latter two assumptions cause your answer to be higher or lower than the true answer?
A bullet of mass 10 g is traveling horizontally at 200 m/s when it strikes and embeds in a pendulum bob of mass 2.0 kg. (a) How much mechanical energy is dissipated in the collision? (b) Assuming that Cv for the bob plus bullet is 3R, calculate the temperature increase of the system due to the collision. Take the molecular mass of the system to be 200 g/mol.
An 8.0-g bullet with a speed of 800 m/s is shot in to a wooden block and penetrates 20 cm before stopping. What is the average forte of the wood on the bullet? Assume the block does not move.
To help prevent frost damage, 4.00 kg of water at 0 is sprayed onto a fruit tree. (a) How much heat transfer occurs as the water freezes? (b) How much would the temperature of the 200-kg tree decrease if this amount of heat transferred from the tree? Take the specific heat to be 3.35k J/kg. , and assume that no phase change occurs in the tree.
Oil at 60°C flows at a velocity of 20 cm/s over a5.0-m-long and 1.0-m-wide flat plate maintained at a constanttemperature of 20°C. Determine the rate of heat transferfrom the oil to the plate if the average oil properties arer = 880 kg/m3, m = 0.005 kg/m?s, k = 0.15 W/m?K, andcp = 2.0 kJ/kg?K.
. (II) A 55-g bullet traveling at 250 m/s penetrates a block ofice at 0°C and comes to rest within the ice. Assuming thatthe temperature of the bullet doesn’t change appreciably,how much ice is melted as a result of the collision?