Just the answer only For questions 31 and 32, refer to the followingsituation.31. A girl throws a ball of plasticine verticallyupwards. The ball goes up and eventuallyreturns to the girl. The starting speed of the ballis 20 m s-¹.Which of the following speed-time graphs bestrepresents the motion of the ball? (Neglect airresistance)в уACy32. Assuming that the acceleration due to gravity gto be 10 m s-2, when will the ball return to thethrower?1sAC 4 s20 mI33. Two similar balls are released from a 40 mbuilding at the same time. One falls from thetop while the other from half way up as shownbelow.I11DVCD Time of travelB 2 s10 sDIncrease in speedINDIINSIMEIMAINimplimeinimCAmWhich quantity is the same for both balls?A AccelerationB Final velocity40 m34. Which of the following does not illustrateuniform motion?A A ball rolls along a frictionless surface.A mass is thrown vertically upwards with aspeed of 10 m s-¹.B)C A lift moves vertically upwards past fivefloors at zero acceleration.DA boy runs 70 m along a straight track at aconstant speed. 835. The graph shows how the speed of an objectvaries with time.velocity/m s-¹B30-CD20---..10-Which of the following is correct?A The average speed of the object during thefirst 4 seconds is 20 m s-¹.The acceleration of the object during thefirst second is 20 m s-².The deceleration of the object is 10 m s-².The object is traveling at a constant speedduring the last second.( )4time/s36. A trolley runs down a slope from rest. In thefirst 3 seconds it travels 3.2 m. What is theconstant acceleration?A 0.2 m s-²C 0.7 m s-2SB 0.4 m s-²D 1.6 m s-²( )37. The velocity-time graph of an object is shown inthe diagram below. Which one of the followingis not correct?velocitylenou6timeA The object is under uniform acceleration.The gradient of the graph is the accelerationof the object. @BCThe area S is the total distance travelled intime t.DThe object starts from rest.CHAPTER 2: Kinematics 15

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31. A girl throws a ball of plasticine vertically upwards. The ball goes up and eventually returns to the girl. The starting speed of the ball is 20 ms-¹. Which of the following speed-time graphs best represents the motion of the ball? (Neglect air resistance) V B V.

31. A girl throws a ball of plasticine vertically upwards. The ball goes up and eventually returns to the girl. The starting speed of the ball is 20 ms-¹. Which of the following speed-time graphs best represents the motion of the ball? (Neglect air resistance) V B V.

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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Just the answer only

For questions 31 and 32, refer to the following
situation.
31. A girl throws a ball of plasticine vertically
upwards. The ball goes up and eventually
returns to the girl. The starting speed of the ball
is 20 m s-¹.
Which of the following speed-time graphs best
represents the motion of the ball? (Neglect air
resistance)
в у
A
Cy
32. Assuming that the acceleration due to gravity g
to be 10 m s-2, when will the ball return to the
thrower?
1s
A
C 4 s
20 m
I
33. Two similar balls are released from a 40 m
building at the same time. One falls from the
top while the other from half way up as shown
below.
I
11
DV
C
D Time of travel
B 2 s
10 s
D
Increase in speed
IND
I
INSIME
IMAIN
implime
inim
CA
m
Which quantity is the same for both balls?
A Acceleration
B Final velocity
40 m
34. Which of the following does not illustrate
uniform motion?
A A ball rolls along a frictionless surface.
A mass is thrown vertically upwards with a
speed of 10 m s-¹.
B
)
C A lift moves vertically upwards past five
floors at zero acceleration.
D
A boy runs 70 m along a straight track at a
constant speed. 8
35. The graph shows how the speed of an object
varies with time.
velocity/m s-¹
B
30-
C
D
20---..
10-
Which of the following is correct?
A The average speed of the object during the
first 4 seconds is 20 m s-¹.
The acceleration of the object during the
first second is 20 m s-².
The deceleration of the object is 10 m s-².
The object is traveling at a constant speed
during the last second.
( )
4
time/s
36. A trolley runs down a slope from rest. In the
first 3 seconds it travels 3.2 m. What is the
constant acceleration?
A 0.2 m s-²
C 0.7 m s-2
S
B 0.4 m s-²
D 1.6 m s-²
( )
37. The velocity-time graph of an object is shown in
the diagram below. Which one of the following
is not correct?
velocity
lenou
6
time
A The object is under uniform acceleration.
The gradient of the graph is the acceleration
of the object. @
B
C
The area S is the total distance travelled in
time t.
D
The object starts from rest.
CHAPTER 2: Kinematics 15

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