Look at the diagram of a Solar System.
The black arrows show the direction of movement of each planet.

The orange arrows show the direction of the force of gravity acting on each planet from the star.
Which planet, A, B, C or D, does not have the arrows correctly marked? Explain your answer.

Weight and mass are connected by the equation $W=m\times g$. An object has a mass of $60 \mathrm{kg}$. Assume that the strength of gravity, $g=10 \mathrm{N} {\mathrm{kg}}^{-1}$.
What is the weight of the object on Earth? Show your working.

 

Weight and mass are connected by the equation $W=m\times g$. An object has a mass of $60 \mathrm{kg}$. Assume that the strength of gravity, $g=10 \mathrm{N} {\mathrm{kg}}^{-1}$.
On the Moon, which quantity from the equation stays the same compared to Earth? Choose the best answer.

The forces on an object can be _____ together. (Choose from: multiplied, added, difference, resultant, balanced, unbalanced)
 

The total force is called the _____ force. (Choose from: multiplied, added, difference, resultant, balanced, unbalanced)

If the total force is zero, all the forces are _____. (Choose from: multiplied, added, difference, resultant, balanced, unbalanced)

Look at the diagrams. Which diagram show balanced forces. Choose the two best answers.

Look at the diagram. Choose the best description of the total forces. (Lines with arrows indicate the forces and their directions)

There are four forces acting on a cube shaped box. 

4 N to the right 
3 N to the upward
2 N to the left
3 N to the downward

Complete this diagram of the forces.