In a test run, a certain car accelerates uniformly from zero to 16.2 m/s in 2.30 s. (a) What is the magnitude of the car's acceleration? _____m/s2 (b) How long does it take the car to change its speed from 8.10 m/s to 16.2 m/s? _______s (c) Will doubling the time always double the change in speed? Yes No       WHY?

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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In a test run, a certain car accelerates uniformly from zero to 16.2 m/s in 2.30 s.

(a) What is the magnitude of the car's acceleration?
_____m/s2

(b) How long does it take the car to change its speed from 8.10 m/s to 16.2 m/s?
_______s

(c) Will doubling the time always double the change in speed?
Yes
No    
 
WHY?
 
A car starts from rest and travels for 7.0 s with a uniform acceleration of +2.1 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.5 m/s2. If the brakes are applied for 2.0 s, determine each of the following.
(a) How fast is the car going at the end of the braking period?
________m/s

(b) How far has the car gone?
________m
 
A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 2.0 m/s, skates by with the puck. After 1.60 s, the first player makes up his mind to chase his opponent. If he accelerates uniformly at 0.46 m/s2, determine each of the following.
(a) How long does it take him to catch his opponent? (Assume the player with the puck remains in motion at constant speed.)
_______s

(b) How far has he traveled in that time?
_______m
 
A ball is thrown vertically upward with a speed of 10.0 m/s.
(a) How high does it rise?
_____m

(b) How long does it take to reach its highest point?
_____s

(c) How long does the ball take to hit the ground after it reaches its highest point?
_____s

(d) What is its velocity when it returns to the level from which it started?
_____m/s
Expert Solution
Step 1

Since you have asked multiple sub-parts only the 3 sub-parts will be solved for you. If you want any specific sub-part to be solved post the question again and highlight or mention the sub-part to be solved.

Write the given values using a suitable variable.

Physics homework question answer, step 1, image 1

Here u signifies initial velocity, v signifies final velocity, and t signifies time.

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