Newton's 1st Law (Physics Concepts)

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

• Stop Immediately

• Slow down and eventually come to a stop

• Go faster and faster

• Move with constant velocity

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 constant velocity

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

• zero

• dependent on your weight

• down

• up

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

• equal to its weight

• equal to its mass

• dependent on how fast it is moving

• zero

You are standing in a moving bus, facing forward, and you suddenly fall forward. You can infer form 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.

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 of friction between you and the floor of the bus

• No force

Answer explanation

This does not have to deal with a type of force, but the fact that you were in motion with the bus. When the bus stopped, you didn't (inertia) and you ended up falling to the ground.