Forces and Newton's Laws Test

Which of Newton's laws best explains why motorists should buckle-up?

• the first law
• the second law
• the third law
• the law of gravitation

When you sit on a chair, the resultant force on you is

• zero
• up
• down
• depends on your weight

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

• stop immediately
• slow down and evdentually come to a stop
• go faster and faster
• move with constant velocity

When the rocket engines on the starship NO-PAIN-NO-GAIN 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

A rocket moves through empty space in a straight line with constant speed. It is far from the gravitational effect of 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
• depends on how fast it is moving
• zero

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

• velocity decreased
• velocity increased
• speed remained the same, but it's turning right
• speed remained the same, but it's turning left

A constant net force acts on an object. Describe the motion of the object.

• constant acceleration
• constant speed
• constant velocity
• increasing acceleration

The acceleration of an object is inversely proportional to

• the net force acting on it
• its position
• its velocity
• its mass

If you blow up a balloon, and then release it, the balloon will fly away. This is an illustration of

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Galileo's Law of inertia

Two cars collide head-on. At every moment during the collision, the magnitude of the force the first car exerts on the second is exactly equal to the magnitude of the force the second car exerts on the first. This is an example of

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's Law of Gravitation