Physics Quiz: Tension and Upthrust

What is tension in physics?

• The force experienced by an object when it is at rest

• The force experienced by an object when it is in motion

• The force experienced by an object when it is floating in water

• The force experienced by a rope, string, or other object when it is pulled tight by forces acting from opposite ends.

Answer explanation

Tension in physics is the force experienced by a rope, string, or other object when it is pulled tight by forces acting from opposite ends.

Define upthrust in physics.

• The force exerted by a solid on an object immersed in it.

• The downward force exerted by a fluid on an object immersed in it.

• The upward force exerted by a fluid on an object immersed in it.

• The force exerted by a gas on an object immersed in it.

Answer explanation

Upthrust is the upward force exerted by a fluid on an object immersed in it.

Explain the concept of tension with an example.

• Tension is the force experienced by a rope, string, or cable when it is pulled tight from both ends.

• Tension is the force experienced by a car moving at a constant speed.

• Tension is the force experienced by a book resting on a table.

• Tension is the force experienced by a balloon when it is filled with air.

Answer explanation

Tension is the force experienced by a rope, string, or cable when it is pulled tight from both ends.

How does upthrust help in the floating of objects?

• By exerting a downward force on the object

• By increasing the weight of the object

• By exerting an upward force on the object equal to the weight of the fluid displaced by the object.

• By causing the object to sink

Answer explanation

Upthrust helps in floating objects by exerting an upward force equal to the weight of the fluid displaced by the object.

What is the role of upthrust in the functioning of submarines?

• Has no impact on the functioning of submarines

• Provides buoyancy and helps control depth

• Causes the submarine to sink to the bottom of the ocean

• Creates propulsion for the submarine to move forward

Answer explanation

Upthrust provides buoyancy and helps control depth, allowing submarines to float and dive.

How does upthrust affect the weight of an object when it is submerged in a fluid?

• It has no effect on the weight of the object.

• It increases the effective weight of the object.

• It makes the weight of the object fluctuate.

• It reduces the effective weight of the object.

Answer explanation

Upthrust reduces the effective weight of an object when submerged in a fluid.

Give an example of upthrust in everyday life.

• A book lying on a table

• An object floating in water

• A balloon deflating

• A rock sinking in water

Answer explanation

Upthrust is the force that makes an object float in water. In this case, the correct example of upthrust in everyday life is an object floating in water.

Explain how upthrust helps in the operation of hot air balloons.

• Upthrust has no effect on the operation of hot air balloons.

• Upthrust provides the heating source for hot air balloons to rise.

• Upthrust provides the lifting force for hot air balloons to rise.

• Upthrust creates a downward force on hot air balloons, preventing them from rising.

Answer explanation

Upthrust provides the lifting force for hot air balloons to rise.

What is the difference between tension and upthrust?

• Tension is the force exerted by a fluid on a submerged object, while upthrust is a force transmitted through a string, rope, or cable

• Tension and upthrust are the same thing

• Tension is a force transmitted through a string, rope, or cable, while upthrust is the upward force exerted by a fluid on a submerged object.

• Tension is the upward force exerted by a fluid on a submerged object, while upthrust is a force transmitted through a string, rope, or cable

Answer explanation

Tension is the force transmitted through a string, rope, or cable, while upthrust is the upward force exerted by a fluid on a submerged object.

How does upthrust affect the buoyancy of an object?

• It makes the object feel lighter in a fluid.

• It has no effect on the buoyancy of an object.

• It makes the object feel heavier in a fluid.

• It causes the object to sink in a fluid.

Answer explanation

Upthrust makes the object feel lighter in a fluid, affecting its buoyancy.