Grade 9 Physics Quiz

Santa's sleigh doesn't start moving until the reindeers pull it, and it doesn't stop until the reindeers stop pulling it. This concept is similar to which of Newton's Laws of Motion?

• Law of Acceleration

• Law of Gravity

• Law of Thermodynamics

• Law of Inertia

Tags

NGSS.MS-PS2-2

Christmas Scenario: Imagine Santa's sleigh is flying in a straight line delivering presents. According to Newton's First Law of Motion, what would happen to the sleigh if the reindeers stop exerting force?

• The sleigh would slow down

• The sleigh would speed up

• The sleigh would continue in a straight line at the same speed

• The sleigh would change direction

Newton's First Law of Motion: Give an example of Newton's First Law of Motion in a Christmas scenario.

• A Christmas ornament rolling uphill without any force applied

• A Christmas card sliding across a table without any external force

• A sled coming to a stop on a snowy hill without applying the brakes

• A toy car continuing to move forward after the push is stopped

Santa is trying to deliver presents on Christmas Eve. If Santa's sleigh is considered as 'm' and the acceleration due to his reindeers is 'a', what is the formula to calculate the force 'F' required to move the sleigh according to Newton's Second Law of Motion?

• F = m/a

• F = mv

• F = 1/2ma

• F = ma

Tags

NGSS.MS-PS2-2

Santa's Sleigh Motion: Define each variable in the formula for Santa's Sleigh Motion, which follows Newton's Second Law of Motion.

• F = force of reindeers, t = time taken, v = velocity of the sleigh

• F = frequency of Santa's 'ho ho ho', m = mass of the gifts, a = area of the sleigh

• F = friction of the sleigh on snow, m = momentum of reindeers, a = angle of the sleigh's flight

• F = force of reindeers, m = mass of the sleigh, a = acceleration of the sleigh

Tags

NGSS.MS-PS2-2

Santa is trying to accelerate his sleigh to deliver gifts. If the combined force of his reindeer is 20N and the mass of the sleigh with gifts is 5kg, what would be the acceleration?

• 2 m/s^2

• 8 m/s^2

• 4 m/s^2

• 10 m/s^2

Tags

NGSS.MS-PS2-2

Santa's Sleigh Motion: State Santa's sleigh motion principle, similar to Newton's Third Law of Motion, in your own words.

• For every gift dropped, there is an equal and opposite uplift to the sleigh.

• For every gift dropped, there is a greater uplift to the sleigh.

• For every gift dropped, there is no uplift to the sleigh.

• For every gift dropped, there is a smaller uplift to the sleigh.

Tags

NGSS.MS-PS2-1

Newton's Third Law of Motion: Provide an example of Newton's Third Law of Motion in action during Christmas.

• When you push a Christmas ornament on a tree, the ornament pushes back with an equal force in the opposite direction.

• When you throw a snowball, the snowball pushes back on your hand with a greater force.

• When you jump for joy on Christmas morning, the ground pushes you up with a greater force.

• When you sit on a sled, the sled pushes back on you with an equal force.

During Christmas, Santa's sleigh experiences Newton's Third Law of Motion. How does this law relate to the action of the reindeers pulling the sleigh and the reaction force?

• The action of the reindeers and the reaction force on the sleigh are equal in magnitude and direction.

• The action of the reindeers and the reaction force on the sleigh are equal in magnitude and opposite in direction.

• The action of the reindeers and the reaction force on the sleigh are only present in certain situations.

• The action of the reindeers and the reaction force on the sleigh are not related to each other.

Christmas Scenario: Santa is trying to understand the difference between the weight of a gift and its mass. Can you explain it to him?

• Weight is the force exerted on a gift due to gravity, while mass is the amount of matter in the gift.

• Weight and mass are interchangeable terms and can be used to mean the same thing.

• Mass is the force exerted on a gift due to gravity, while weight is the amount of matter in the gift.

• Weight is the same as mass, just measured in different units.