Sam is flying a kite. There is a strong wind blowing. The picture below shows the forces acting on the kite.

Which letter shows the gravitational force on the kite?

Priya and Lily are investigating air resistance. Priya uses a stopwatch and Lily drops the parachute.

Here is their prediction:

“We think bigger parachutes will fall more slowly.”

Their prediction is correct. Complete the sentences using the words given below:

less, more, the same

The bigger parachutes have _____________ air resistance.

This makes the bigger parachute fall with _____________ speed.

(a)  

a) Which surface produced the most friction?

b) How do you know this?

c) Why did this surface produce the most friction?

Yasmeen fills a test tube with oil. She drops a coin into the oil.

Amira fills a test tube with water. She drops an identical coin into the water.

a) Predict in which test tube the coin will reach the bottom quickest.

b) Name the force that makes one coin drop more slowly to the bottom of the test tube.

Choose the appropriate words from the hot air balloon to match the meanings listed below:

a) The amount of matter in an object, measured in kilograms. _________________

b) The force that pulls the objects towards the Earth. ___________________

c) The unit used to measure forces. _________________________

d) Two forces of the same size that act in opposite directions on an object. _________________

e) A force that slows things down. _______________________

f) The force caused by air pushing against moving objects. ______________________

(a)