Forces, Newton's Laws, Mechanical Energy

Moving from 0 m/s to 25 m/s in 8.0 s equals an average acceleration of

• 0.32 m/s.
• 0.32 m/s2
• 3.1 m/s
• 3.1 m/s2

Tags

NGSS.HS-PS2-1

When an object is in free fall, the only force acting on it is

• gravity
• friction
• inertia
• terminal velocity

Tags

NGSS.HS-PS2-4

When objects are moved further apart from each other, the force of gravity between them

• increase
• decrease
• stays the same
• decreases then increases

Tags

NGSS.HS-PS2-4

When objects are moved further apart from each other, the force of gravity between them

• increase
• decrease
• stays the same
• decreases then increases

Tags

NGSS.HS-PS2-4

The law that states that every object maintains constant velocity unless acted on by an unbalanced force is

• Newtons 1st law
• Newtons 2nd Law
• Newtons 3rd Law
• Law of Conservation of Momentum

Friction is defined as the 

• force that opposes motion between two surfaces that are touching
• rate at which velocity changes.
• resistance of an object to a change in its velocity.
• speed of an object in a particular direction.

If you are given the mass of an object in pounds, the time in seconds, and the distance in feet, what must you do before you can calculate the momentum in SI units?

• convert the mass to KG
• Convert distance to meters
• change mass and distance
• none of these

Calculate the velocity of a 90.5 kg man running south with a momentum of 389 kg • m/s.

• 
  0.233 m/s south
• 
  4.30 m/s south
• 
  23.3 m/s south
• 
  35.2 m/s south

Tags

NGSS.HS-PS2-1

If two objects with different masses and traveling with different velocities collide, what law allows you to predict the motion of the objects after the collision?

• law of conservation of momentum
• law of universal gravitation
• newtons 1st law
• newtons 2nd law

Tags

NGSS.HS-PS2-2

If two objects with different masses and traveling with different velocities collide, what law allows you to predict the motion of the objects after the collision?

• weight and velocity
• mass and acceleration
• mass and velocity
• weight and acceleratoin

Tags

NGSS.HS-PS2-2