Forces
State two instances where friction is unhelpful.
Open ended.
<---- ---------->
152N 237N
85N right.
What force acts in an upwards direction on objects floating on water?
Upthrust.
What part of the cell contains the genetic material?
The nucleus.
What is the difference between 'mass' and 'weight' ?
Mass is the amount of matter something is made out of (measure in kg).
Weight is a measure of the amount of gravitational pull on an object (measured in N).
11N 43N
---> ------>
<------
27N
27N right
When a parachutist falls out of an aeroplane, the only force acting on him initially is gravity.
True or false.
FALSE.
If a compound has a boiling point of -120C and a melting point of -135C, what state of matter is it at room temperature?
Gas.
Name all 9 forces we have learnt.
Tension, driving force, upthrust, water resistance, air resistance, friction, magnetic, gravitational force, electrostatic.
<---------- ------>
2561N 987N
1574N left
Minus points for you.
-300
How many siblings do I have? State how many brothers/sisters.
Four. Two brothers and two sisters.
Who is the unit of forces named after? Full name.
Sir Isaac Newton.
121N 375N
-----> ----------->
--------------->
567N
1063N right
Draw two force-body diagrams. Label ALL the forces acting in both diagrams.
Open ended.
Which phenomenon explains why a straw looks “bent” when it sits in a glass of water?
Refraction.
It remains at rest.
221N 582N
<----- <------------
---------> <-----------------
315N 789N
1277N left.
Name all four forces acting on a car that is moving on the road.
Weight, Air resistance, Friction and Driving force.
Name the strongest muscle in the body for its weight (or state the place where it is in the body).
Masseter/ jaw.