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Science > Science Lesson 1 What Is Force > Flashcards

Science Lesson 1 What Is Force Flashcards

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1
Q

What is force?

A

Force is a push or pull that can change the state of motion of an object.

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2
Q

True or False: Force is a vector quantity.

A

True

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3
Q

What is the SI unit of force?

A

Newton (N)

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4
Q

Fill in the blank: According to Newton’s second law, force equals ________ times acceleration.

A

mass

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5
Q

What is the equation for force?

A

Force = mass x acceleration

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6
Q

What is the net force acting on an object in equilibrium?

A

Zero

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7
Q

True or False: Friction is a force that opposes motion.

A

True

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8
Q

What type of force keeps planets in orbit around the sun?

A

Gravitational force

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9
Q

What is the formula for gravitational force between two objects?

A

F = G * (m1 * m2) / r^2

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10
Q

Fill in the blank: The force of gravity on Earth is approximately ________ N/kg.

A

9.8

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11
Q

What is the normal force?

A

The force exerted by a surface to support the weight of an object resting on it.

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12
Q

What is the force experienced by a charged particle moving in a magnetic field?

A

Magnetic force

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13
Q

What is the unit of charge in the SI system?

A

Coulomb (C)

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14
Q

What type of force holds atoms and molecules together?

A

Electromagnetic force

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15
Q

True or False: Tension is a force that acts along a stretched string or rope.

A

True

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16
Q

What is the force that opposes the motion of an object through a fluid?

A

Drag force

17
Q

What is the force that results from the deformation of an object?

A

Spring force

18
Q

Fill in the blank: The force that a surface exerts on an object in contact with it is called ________ force.

A

normal

19
Q

What is the force that arises due to the interaction of two electrically charged objects?

A

Electrostatic force

20
Q

True or False: Weight is a force that depends on the mass of an object.

A

True

21
Q

What is the force exerted by a spring when it is stretched or compressed?

A

Spring force

22
Q

What type of force acts on an object in free fall?

A

Gravity

23
Q

Fill in the blank: The force of air resistance on a falling object depends on its ________ and speed.

A

shape

24
Q

What is the force that opposes the motion of an object sliding across a surface?

A

Frictional force

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