| 1. A stone is tossed straight upwards with initial positive velocity of 30 m/s. What is its instantaneous velocity and acceleration at the highest point of its trajectory? a) velocity = 30 m/s, acceleration = -9.8 m/s² b) velocity = 0 m/s, acceleration = -9.8 m/s² c) velocity = -30 m/s, acceleration = 0 m/s² d) velocity = 0 m/s, acceleration = 0 m/s² e) velocity= 30 m/s, acceleration = 0 m/s² 2. Two friends start walking from the same school and arrive at the same destination, but they take different routes. Which of the following quantities must be the same for both friends? a) average velocity d) distance b) average speed e) displacement c) acceleration

Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter6: Motion In Two Dimensions
Section6.3: Relative Velocity
Problem 27PP
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1.
A stone is tossed straight upwards with initial positive velocity of 30 m/s. What is its instantaneous
velocity and acceleration at the highest point of its trajectory?
a) velocity = 30 m/s, acceleration = -9.8 m/s²
b)
velocity = 0 m/s, acceleration = -9.8 m/s²
c)
velocity = -30 m/s, acceleration = 0 m/s²
d)
velocity = 0 m/s, acceleration = 0 m/s²
e)
velocity= 30 m/s, acceleration = 0 m/s²
2.
Two friends start walking from the same school and arrive at the same destination, but they take
different routes. Which of the following quantities must be the same for both friends?
a)
average velocity
d)
distance
b) average speed
e)
displacement
c)
acceleration
Transcribed Image Text:| 1. A stone is tossed straight upwards with initial positive velocity of 30 m/s. What is its instantaneous velocity and acceleration at the highest point of its trajectory? a) velocity = 30 m/s, acceleration = -9.8 m/s² b) velocity = 0 m/s, acceleration = -9.8 m/s² c) velocity = -30 m/s, acceleration = 0 m/s² d) velocity = 0 m/s, acceleration = 0 m/s² e) velocity= 30 m/s, acceleration = 0 m/s² 2. Two friends start walking from the same school and arrive at the same destination, but they take different routes. Which of the following quantities must be the same for both friends? a) average velocity d) distance b) average speed e) displacement c) acceleration
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