1.8 Tension and upthrust.

What happens if the weight of an object is equal to or less than the upthrust?

• It floats

• It sinks

• It spins

• It explodes!

Objects A-D are in water. Which is the most dense?

• A
• B
• C
• D

What is the type of force in a rope when the rope is stretch by a weight?

• Tension

• Gravitational force.

• Upthrust.

• Thrust.

When a boat is float on a river,

• its weight is larger than its upthrust.

• its upthrust is larger than its weight.

• its upthrust is equal to its weight.

Which two forces act on an object in water?

• gravity

• friction

• weight

• upthrust

What is the scientific word for 'floating'

• levitating

• suspended

• buoyancy

• hovering

What happens if the weight of an object is greater than the upthrust?

• it floats

• it sinks

• it bounces

• it vibrates

A 20N weight is hung from a spring balance which reads 17N when it is completely submerged in water. What is the upthrust of the body of water?

• 37N

• 20N

• 17N

• 3N

An object weighing 30 N displaces a volume of water with a weight 20 N. What will the object do?

• It will sink

• It will float

• It will fly

• None of these answers

5. The up thrust and weight act in ___________

• same direction

• opposite direction

• upward

• downward