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A 9-g bullet is fired from a rifle. It takes 3.30 10-3 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 745 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted on the bullet.
_______ N
Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work completed by each force.
A 3.10 kg steel ball strikes a wall with a speed of 10 m/s at an angle of 60 ° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.190 s, what is the average force exerted on the ball by th..
Brewed coffee is often too hot to drink right away. You can cool it with an ice cube, but this dilutes it. what is the final temperature of the coffee
What would be the final temperature of 100g of 16°C water when 107 g of 40°C iron nails are submerged in it? (The specific heat of iron is 0.12 cal/g °C. Here you must equate the heat gained by the water to the heat lost by the nails.)
A 5.0 kg textbook is raised a distance of 30 cm as a student prepares to leave for school. How much work did the student do on the textbook
The human eye is able to detect as little as 2.35 × 10-18 J of green light of wavelength 510 nm. Calculate the minimum number of photons of green light
the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
Scientists plan to release a space probe that will enter the atmosphere of a gaseous planet. What is the approximate temperature at this altitude
How much friction must be exerted between the skates and ice.
Objective questions based on force and acceleration.
a rock is thrown downward from the top of a building 168 ft high at an angle of 60 with the horizontal. how far from the base will the rock land
The balls have a glancing collision, not a head-on collision, deflecting the second ball by 90° and sending it north at 1.51 m/s. Illustrate what are the speed and direction of the first ball after the collision?
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