Question 7 A projectile fired from a gun has initial horizontal and vertical components of velocity equal to 280 m/s and 370 m/s, respectively. Determine the maximum height above the gun that the projectile reaches in its trajectory. 19 m 38 m 7000 m 3500 m 8.You want to throw a water balloon horizontally from the top of a 10 m building and hit a baby sitting 10 m from the base of the building. What should the initial speed be? 1.4 m/s 7 m/s 9 m/s 5 m/s 12.  The coefficient of kinetic friction between the tires of a car and a wet road surface is 0.52. If the car is traveling at an initial speed of 25 m/s, and then slams on the breaks so the car skids straight ahead to a stop, how far does the car skid?  Assume the mass of the car to be 1000 kg. 57 m 61 m 123 m 32 m

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Question 7
A projectile fired from a gun has initial horizontal and vertical components of velocity equal to 280 m/s and 370 m/s, respectively. Determine the maximum height above the gun that the projectile reaches in its trajectory.
19 m
38 m
7000 m
3500 m
8.You want to throw a water balloon horizontally from the top of a 10 m building and hit a baby sitting 10 m from the base of the building. What should the initial speed be?
1.4 m/s
7 m/s
9 m/s
5 m/s
12. 
The coefficient of kinetic friction between the tires of a car and a wet road surface is 0.52. If the car is traveling at an initial speed of 25 m/s, and then slams on the breaks so the car skids straight ahead to a stop, how far does the car skid?  Assume the mass of the car to be 1000 kg.
57 m
61 m
123 m
32 m
 
 
Expert Solution
Step 1

Given

For Q.7

UX = 280 m/s

UY = 370 m/s

For Q.8

h =10 m

R= 10 m

For Q.12u =25 m/sv=0μ =0.52m=1000 kg

 

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