Sinking, floating and water pressure

Select the correct statement.

• The forces in the picture are unbalanced.

• The forces in the picture are balanced.

• The people on the right will win the tug of war.

• The people on the left will win the tug of war.

Select the correct explanation for why the forces are balanced.

• One team is pulling with 300N and their force arrow is larger.

• One team is pulling with 300N and the force arrows are the same size.

• Both teams are pulling with 300N and the force arrows are different sizes.

• Both teams are pulling with 300N and the force arrows are the same size.

Select the term which means forces cancel each other out, or are balanced.

• Equivocal

• Equipment

• Equilibrium

• Equivalent

Select a force which is not acting on the car.

• Driving force (thrust)

• Friction

• Resistive forces

• Upthrust

Select the correct statement.

• The driving force is less than the resistive forces and friction.

• The driving force is greater than the resistive forces and friction.

• The driving force is equal to the resistive forces and friction.

• None of these statements is correct.

Write down the force which pushes things up in water.

Select the best explanation for why the boat is floating.

• Neither answer is correct.

• Both answers are correct.

• Upthrust and weight are balanced.

• There are more water molecules hitting the bottom of the boat than air molecules hitting the top.

Select the best explanation for why the boat would sink.

• Weight is equal to uphthrust.

• Weight is more than uphtrust.

• Weight is less than uphthrust.

• Weight and upthrust are in equilibrium.

Suggest where water pressure would be highest.

• At the top of the ocean.

• In the middle of the ocean.

• At the very bottom of the ocean.

• There would be no difference.

Suggest why pressure is highest at the very bottom of the ocean.

• There is less weight from all of the particles above.

• There is more weight from all of the particles above.

• There is not much upthrust.

• There is lots of upthrust.