Inertia

In the absence of an external force, a moving object will

• Stop immediately

• Slow down and eventually come to a stop

• Go faster and faster

• Move with a constant velocity

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NGSS.MS-PS2-2

When the rocket engines on a spacecraft are suddenly turned off while traveling in empty space, the starship will

• Stop immediately

• Slowly slow down, and then stop

• go faster and faster

• move with a constant velocity

Tags

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NGSS.HS-PS2-2

When you sit on a chair, the net external force on you is ________.

• Zero

• Dependent on your weight.

• Down

• Up

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A rocket moves through empty space in a straight line with constant speed. If is far from the gravitational effect on any star or planet. Under these conditions, the force that must be applied to the rocket in order to sustain its motion is ______________.

• Equal to its weight

• Equal to its mass

• dependent on how fast it is moving

• zero

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NGSS.HS-PS2-1

You are standing in a moving bus, facing forward, and you suddenly fall forward. You can infer from this that the bus's ______________

• Velocity decreased

• Velocity increased

• Speed remained the same, but it's turning to the right

• Speed remained the same, but it's turning to the left

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NGSS.MS-PS2-2

You are standing in a moving bus, facing forward, and you suddenly move forward as the bus comes to an immediate stop. What force caused you to move forward?

• Gravity

• Normal Force due to your contact with the floor of the bus

• Force due to friction between you and the floor of the bus

• No force

Tags

NGSS.MS-PS2-1

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