Understanding Forces and Motion

What is a force?

• A push or a pull that acts on an object

• A type of energy

• A measurement of speed

• A change in direction

What are the two main categories of forces?

• Contact forces and non-contact forces

• Magnetic forces and gravitational forces

• Frictional forces and tension forces

• Upthrust and thrust forces

What is a force meter used for?

• To measure the size of a force

• To measure speed

• To measure distance

• To measure temperature

What is a systematic error?

• An error that occurs consistently

• An error that occurs randomly

• An error that is negligible

• An error that is unavoidable

The gravitational field strength on Jupiter is 25N/kg. Calculate the weight of a person with a mass of 60 kg on Jupiter.

• 1487.4N

• 1200N

• 180N

• 1500N

• 2000N

The gravitational field strength on Earth is approximately 9.81 N/kg. What would be the weight of a 50 kg object on Earth?

• 490.5N

• 500N

• 450N

• 600N

• 550N

Avyaan is curious about the significance of the gravitational force in our daily lives. Can you help him understand?

• Gravitational force is solely responsible for the growth of plants.

• Gravitational force has no effect on the weather patterns on Earth.

• Gravitational force is only important for astronauts in space.

• Gravitational force is significant as it keeps us grounded, influences movement, and governs the orbits of celestial bodies.

How do action-reaction pairs work in a rocket launch?

• Action-reaction pairs work by the rocket expelling gas downwards, resulting in the rocket being propelled upwards.

• The rocket uses solar energy to lift off.

• The rocket's engines create a vacuum to pull it upwards.

• The rocket relies on magnetic fields to launch into space.

During a science experiment, Kiara dropped a feather and a bowling ball from the same height. What is the effect of air resistance on these falling objects?

• Air resistance has no effect on falling objects.

• Air resistance increases the speed of falling objects.

• Air resistance only affects objects that are not heavy.

• Air resistance slows down falling objects and can lead to terminal velocity.

What is the unit of measurement for forces?