igure below is a velocity-versus-time graph for a moving object. Match the answers with questions for the object's velocity (v) and acceleration (a) at different time instants. velocity time in seconds at t= 1.0 s at t = 2.0 s at t = 4.0 s A. V = 0; a # 0 B. V = 0; a = 0 C. V# 0; a #0 D.V0; a = 0
igure below is a velocity-versus-time graph for a moving object. Match the answers with questions for the object's velocity (v) and acceleration (a) at different time instants. velocity time in seconds at t= 1.0 s at t = 2.0 s at t = 4.0 s A. V = 0; a # 0 B. V = 0; a = 0 C. V# 0; a #0 D.V0; a = 0
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Transcribed Image Text:Figure below is a velocity-versus-time graph for a moving object. Match the answers with questions for the object's velocity (v) and acceleration (a) at different time instants.
A
time in seconds
velocity in meters/second
+10
at t = 1.0 s
at t = 2.0 s
at t = 4.0 s
A. V = 0; a # 0
B. V = 0; a = 0
C. V # 0; a #0
D.V # 0; a = 0
Transcribed Image Text:Question 9
An object moves to the right and slows down with a constant acceleration. What can you say about its velocity and acceleration? Select all apply.
The velocity is positive.
The velocity is negative.
The velocity is zero
The acceleration is positive.
The acceleration is negative.
The acceleration is zero.
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Expert Solution
Step 1
A velocity time graph indicates the velocity of an object at different time intervals
If the velocity time graph has a smooth rising curve, it means that the velocity is increasing uniformly and thus the object has a constant acceleration.
If the velocity time graph has an abruptly rising curve, it means that the velocity is increasing non uniformly and the object has a varying acceleration.
If the velocity time graph has a horizontal line, then the velocity is constant and thus the object has a zero acceleration.
When the curve in a velocity time graph is a smoothly receding curve, then the object is said to be decelerating at a constant rate.
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