A car driver steps on the accelerator sharply when the traffic lights turn green. The force on the car varies with time as shown. force 0 Which graph shows the variation of the car's speed with time? A speed 0 time time
A car driver steps on the accelerator sharply when the traffic lights turn green. The force on the car varies with time as shown. force 0 Which graph shows the variation of the car's speed with time? A speed 0 time time
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
No.8 and No.9
Transcribed Image Text:A car rolls down a sloping runway and reaches a
smooth flat surface (see diagram below).
Which of the following velocity-time graph best
illustrates the motion of the car?
AV
B
C
D v
7. A helicopter is moving horizontally at a speed of
180 km h-¹. It then accelerates uniformly at
2 m s² for 10 seconds. Find the final speed of
the helicopter.
A 50 m s™¹
C 200 m s
B
D
70 m s-¹
668 m s-¹
( )
→
time
8. A car driver steps on the accelerator sharply
when the traffic lights turn green. The force on
the car varies with time as shown.
force
time
( )
Which graph shows the variation of the car's
speed with time?
A speed
B speed
C speed
D
speed
C
0
B speed
D
9. A basketball is thrown vertically downwards
with a speed of 10 m s-¹ at a height of 8 m.
from the ground and rebounces. Which of
the following graphs correctly represents the
relation between the speed of the ball and
time?
A
speed
time
speed
→
time
speed
time
140
+
time
time
time
time
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