WorksheetsY7 Balance
Total questions: 24
Worksheet time: 35mins
Sort the effects into those of balanced and unbalanced forces
move at constant speed
change in speed
stay at rest
change direction
change shape
What is force A?
(a)
What is force B?
(a)
What is force C?
(a)
What is force D?
(a)
What is force E?
(a)
Jenny and Carlo were in science class learning about forces. Jenny said that an object with greater mass would have greater weight. Jenny and Carlo decided to find out if this was true. They measured the mass of Carlo's pencil case, then they measured the weight of it. Jenny said that the results showed that she was correct. Carlo said that they couldn't be sure.
What was the independent variable?
(a)
What was the dependent variable?
(a)
What did Jenny and Carlo use to measure the mass of the pencil case?
a forcemeter
an electronic balance
a measuring cylinder
a thermometer
What did Jenny and Carlo use to measure the weight of the pencil case?
a forcemeter
a thermometer
an electronic balance
a measuring cylinder
What is the unit for mass?
(a)
What is the unit for weight?
(a)
Why should Jenny and Carlo do these things to be more confident in their conclusion?
do more trials of each object
check if results are reliable
use more objects
test prediction is always true
always use the same balance and forcemeter
to make measurements more accurate
carry out their experiment with the same gravity
keep their investigation a fair test
Is Jenny's hypothesis correct?
Yes
No
The density of sea water is 1.03 g/cm3. Sort the following objects into whether they will float or sink.
potato - 0.6 g/cm3
beach ball - 0.1 g/cm3
jelly - 1.2 g/cm3
coin - 5.4 g/cm3
pack of butter - 0.9 g/cm3
highland cow - 1.3 g/cm3
The distance-time graph shows a tortoise going for a walk around Hong Kong Island. When was it moving most slowly?
A - B
B - C and D - E
C - D
E - F
The distance-time graph shows a tortoise going for a walk around Hong Kong Island. When was it moving most quickly?
A - B
B - C and D - E
C - D
E - F
The distance-time graph shows a tortoise going for a walk around Hong Kong Island. When did it stop for a sleep?
A - B
B - C and D - E
C - D
E - F
The distance-time graph shows a tortoise going for a walk around Hong Kong Island. What was its average speed as it walked home? Don't forget the units!
(a)
What will happen to the speed of the trolley?
It will speed up
It will slow down
It will stay the same
What will happen to the speed of the skydiver?
They will speed up
They will slow down
They will travel at a constant speed
What will happen to the speed of the car?
It will speed up
It will slow down
It will travel at a constant speed
What will happen to the box?
It will accelerate left
It will accelerate right
It will stay in the same place
Which row correctly shows the mass and weight of an object on Earth?
A
B
C
D
Sort out the statements into mass and weight
measured in kg or g
measured using an electronic balance
is the amount of matter an object contains
doesn't change if you go to the moon
is measured in N
is measured using a forcemeter
is a force
would change if you were on the moon
A parrot flies 25km in 2 hours. What was its average speed? Don't forget the units!
(a)
A van drives 120km at an average speed of 60km/h. How long will the journey take?
(a)
A runner runs at an average speed of 12km/h. How far will they travel in 20 mins? Remember units!
(a)
When is friction useful?
writing with a pencil
trying to push a heavy box along the ground
using brakes
To reduce friction between the moving parts of a bicycle, we can use oil. Oil is an example of a (a)
Using the dimensions and mass shown in the picture, calculate the density of the box. Remember units!
(a)
