Newton's Laws CFA: 8.6C
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Science
8th Grade
NGSS covered
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7 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Rockets are launched into space using jet propulsion where exhaust accelerates out from the rocket and the rocket accelerates in an opposite direction.
Tags
NGSS.HS-PS2-1
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A soccer ball accelerates more than a bowling ball when thrown with the same force.
Tags
NGSS.MS-PS2-2
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A rocket is sent into space. When the power dies out, the rocket will just keep floating and moving in space forever (unless an unbalanced force, such as a meteor, runs into it).
Tags
NGSS.HS-PS2-2
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the force of gravity on a ball if the ball has a mass of 10kg and accelerates to earth at 9.8m/s2 ?
98 N
9.8 N
980 N
10 N
Tags
NGSS.MS-PS2-2
NGSS.MS-PS2-4
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
During a demonstration of Newton’s laws of motion, a student used the setup shown in Figure 1. The student flicked the index card with a fingertip, and the coin fell straight down into a plastic cup as shown in Figure 2. Which of these best explains why the coin fell straight down into the cup instead of remaining on the index card?
The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.
Moving the card applied an action force on the coin. Since the card was gone, gravity applied a reaction force on the coin.
The card had less mass than the coin, so a smaller force of gravity acted on the card. The larger force of gravity on the coin made it fall.
The acceleration of the coin falling into the cup was equal and opposite to the acceleration of the card.
Tags
NGSS.MS-PS2-2
NGSS.MS-PS2-4
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction force is...
Tags
NGSS.MS-PS2-1
7.
DROPDOWN QUESTION
5 mins • 20 pts
Forces that have a net force of zero (a)
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