Author: molly stones

Why is the orbit time for Mercury shorter than Saturn’s? Use at least one equation in your answer.

How does a seatbelt prevent injury? Use at least one equation in your answer.

State one piece of evidence for light being a wave.

How is the ionosphere used in communication?

Why does a gun recoil?

What is the critical angle?

Ball A and B collide. Ball A is initially travelling 5m/s with ball B stationary. After they collide Ball A is stationary. Ball A is 5kg and ball B is 2kg. What is the velocity of ball B after the collision? Show the equations you use.

Complete the diagram to show what focal length is. Include the following labels: convex lens, principal axis, focal point.

Draw a diagram to show the motion of a tennis ball that had just been bounced off the floor.

A car starts at 10m/s and accelerates to 25m/s, this takes 10 seconds. What was it’s acceleration? Show your working.
Answer…………….. m

At point A two waves interfere. Point A is 9cm away from source 1 and 15cm away from source 2. The wavelength is 3cm. Will the interference be constructive or destructive? Why?

Name 2 scalar quantities.
Name 2 vector quantities.

Draw the resultant vector if a plane flies 20km due North and 15km due East.

What do the following things represent in equations? What are their units?
s
a
u
v
t
sin i
sin r
n
c