Transcript Explaining motion QA

Explaining motion
P4
Questions/Answers
Question 1
What is the name used to
describe a pair of forces?
Answer
Interaction pair
Question 2
Which of these are not true about
interaction pairs of forces?
A) always equal in size
B) opposite in direction
C) act on different objects
D) one of them is always friction
Answer
Answer D – one of
them is always friction.
Question 3
Write down the
equation to calculate
speed.
Answer
Speed = Distance / Time
Question 4
If car has travelled
3000m in 100 minutes
what is its speed in
m/min and m/s?
Answer
30m/min
and
0.5m/s
Question 5
Sketch a distance time
graph to show a car starting
from stationary, travelling at
a constant speed and then
stopping.
Answer
distance
time
Question 6
Sketch a speed time
graph to show a car
accelerating, then
travelling at a constant
speed, then slowing
down to stop.
Answer
Speed
Time
Question 7
Describe what is happening during the journey
in this velocity time graph.
10
mph
velocity
time
Answer
The object is travelling at a
velocity of 10mph then
begins to slow down, it
stops for a moment
(intersection on x axis) then
goes backwards.
Question 8
TRUE or FALSE
If two objects have different
masses, the heavy one moves
faster than the light one?
Answer
FALSE the heavier object
moves slower than the light
one.
Question 9
Calculate the momentum of
a lorry of a mass 5000kg
travelling at 2m/s.
Answer
10000kg m/s
Question 10
Calculate the work done by
a man pushing a car 25m
along a road if he pushes
with a force of 600N
Answer
15000J