1.8 tension and up thrust

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

• it floats

• it sinks

• it bounces

• it vibrates

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

• Tension

• Gravitational force.

• Upthrust.

• Thrust.

3. Why do boats float?

• The material they are made up of.

• Their volume gives them a large density

• Their hollow shape leads to a low density.

4. Identify on what factor upthrust depends on?

• Density of the liquid

• Density of the object

• mass of the object

5. The up thrust and weight act in ___________

• same direction

• opposite direction

• upward

• downward

6. Which word describes an object that will not return to its original shape when forces are removed?

• Plastic

• Linear

• Elastic

Which word describes an object that will return to its original shape when forces are removed?

• Plastic

• Linear

• Elastic

How will we know if a substance is less dense than water?

• Upthrust is less than weight

• It will sink

• It will float

9. What is density?

• Mass per unit volume

• Volume per unit mass

• Volume per unit mass

10. Which two forces act on an object in water?

• gravity and upthrust

• friction and gravity