Measuring Forces with Spring Balances

What is a force?

A type of matter
A type of energy
A push or a pull (correct)
A type of motion

What is the effect of a force on a stationary object?

It changes its direction
It remains unchanged
It changes its shape
It makes it move (correct)

What is the unit of measurement for forces?

Meters
Kilograms
Newton (correct)
Joules

What happens to a spring when it is pushed or pulled?

It is compressed or stretched (B) Signup and view all the answers

What is the approximate force exerted by an apple on your palm?

1 N (A) Signup and view all the answers

What is the purpose of a forcemeter or spring balance?

To measure the force of an object (A) Signup and view all the answers

What is the primary function of the pointer attached to the spring in a spring balance?

To measure the magnitude of the force (B) Signup and view all the answers

What happens to the spring when a force is applied to it in a downward direction?

It becomes stretched (A) Signup and view all the answers

Which of the following is NOT a type of spring balance used in a laboratory?

Digital spring balance (A) Signup and view all the answers

What is the primary difference between the spring balance used in a laboratory and the one used in markets or grocery stores?

The scale used to measure the force (D) Signup and view all the answers

What is the relationship between the force applied to the spring and the resulting extension or compression?

The force is directly proportional to the extension or compression (A) Signup and view all the answers

What happens to the stone when the string tied to it is cut in water?

It sinks in the water (B) Signup and view all the answers

What is the relationship between the weight of the wood in air and the upthrust acting on the wood in water?

The upthrust can be greater than, smaller than, or equal to the weight of the wood in air (B) Signup and view all the answers

What is the purpose of step 4 in the Try It Out activity?

To gently place the wood in the water and record the weight of the wood (B) Signup and view all the answers

What happens to the wood when the string is cut in water, according to the experiment?

It floats on the surface of the water (A) Signup and view all the answers

What is the force that acts on the wood when it is immersed in water?

Both the weight of the wood and the upthrust (A) Signup and view all the answers

What is the condition for an object to float in water?

The weight of the object is smaller than the upthrust (A) Signup and view all the answers

What is the force exerted by a fluid on an object that is partially or fully immersed in it?

Upthrust (B) Signup and view all the answers

Why does an object weigh less in water than in air?

Because the upthrust cancels out some of the weight of the object (B) Signup and view all the answers

What is the relationship between the weight of the displaced water and the upthrust?

The weight of the displaced water is equal to the upthrust (C) Signup and view all the answers

What happens to the arms of a balance when one of the weights is immersed in water?

The arms become unbalanced (D) Signup and view all the answers

What is the primary difference between the concepts of mass and weight?

Mass is the force exerted by an object on the surface, while weight is the force exerted by gravity on an object (C) Signup and view all the answers

What is the name of the ancient scientist who discovered the principle related to the upthrust?

Archimedes (A) Signup and view all the answers

Which of the following statements about gravitational force is true?

Gravitational force can act from a distance, similar to magnetic force (A) Signup and view all the answers

What is the direction of the upthrust and weight acting on an object partially or fully immersed in a fluid?

The upthrust and weight act in opposite directions (C) Signup and view all the answers

What would be the weight of an object with a mass of 1 kg on the Moon?

Less than on Earth, but not zero (D) Signup and view all the answers

According to the scientific definition, what is your weight if your mass is 50 kg?

500 N, the force exerted by gravity on your body (A) Signup and view all the answers

What is the primary reason objects fall towards the ground when released from a height?

The Earth's gravity pulls them towards its centre (A) Signup and view all the answers

In which environment would astronauts float in the absence of gravity?

In outer space (C) Signup and view all the answers