chap 7 revision practice Q's

Question 1

when making a graph what should you remember for axis

Answer 1

.you can make you’r max value on the axis go past the one on the table

Question 2

when answering about the acceleration on the graph what should you say

Answer 2

.a is gradient (statement of what it is)
.gradient is constant and negative (description) s.d

Question 3

trapezium formula

Answer 3

((a+b)/2)*h

Question 4

if you have to change axis round and describe the graph

Answer 4

.describe graph through the gradient

Question 5

Answer 5

Question 6

Answer 6

you should think of what is required to calculate (formula) and how those things in formula might be affected

Question 7

Answer 7

Question 8

Answer 8

Question 9

Y: X: Calculate the overall velocity and
angle of the
ball as it passes over the net.
S1= 2.51 S2= 1 St =1.15 S=
U= 0 U= 18
V= 5.44 V=
A= -9.8 A =
T=0.555 T= 0.555

Answer 9

Question 10

Answer 10

Question 11

Answer 11

Question 12

Answer 12

Question 13

Answer 13

Question 14

convert 150kmh^-1 to ms^-1

Answer 14

(150*10^3)/(3600) = 41.67 ms^-1

Question 15

what does the y-intercept on a dicplacement time graph equal

Answer 15

initial dicplament

Question 16

describe decreasing acceleration on a velocity time graph

Answer 16

Question 17

describe a bouncing ball on a speed-time, velocity-time and acceleration-time graph

Answer 17

Question 18

what do you do if you want the maximum time of flight of a projectile path and you got the inital velocity of path and angle to the horizontal of it

Answer 18

Question 19

what increases with speed

Answer 19

air resistance

Question 20

what would happen to skydiver when he pulls parachute

Answer 20

skydiver doesn’t go up but decealerates

Question 21

what is an independent, dependent, control variable

Answer 21

• Independent - the variable you change & is unaffected by other variables
• dependent - the variable you measure and depends on other variables
• control - stay the same

Question 22

for calculating gravity practical, what do we make the y-axis when plotting results

Answer 22

2h/t - from formula s = ut + 1/2at^2