Newton's First and Second Law

If you increase the force on an object, its acceleration

• decreases
• stays the same
• also increases
• stops

Tags

NGSS.MS-PS2-2

What is Newton's First Law

• F=ma
• Every action has an equal and opposite reaction
• An object at rest stays at rest, an object in motion stays in motion. 
• Friction 

An object in motion will stay in what kind of motion as long as the net forces acting on it are zero?

• slowing motion in a straight line
• accelerating motion in a straight line
• constant motion in a straight line
• constant motion in an unpredictable direction

Tags

NGSS.MS-PS2-2

friction is a force that acts 

• in the same direction as the motion
• opposite to the direction of the motion
• opposite to the applied forces
• the same direction as the applied force

Which one needs a greater net force to move, a kilogram of feathers or a kilogram of iron? 

• feathers 
• iron
• same
• depends on their friction

Which has more Inertia? 

• Truck
• Ant
• A cat
• A skateboard

Tags

NGSS.MS-PS2-2

F=MA
If you are pushing a 1000 kg car at 0.5 m/s², how many newtons would that be? 

• 2000 N
• 60N
• 500 N
• 12 N

Tags

NGSS.MS-PS2-2

What Unit do we Measure Force in? 

• Newtons
• Joules
• Force
• Don't know

F=MA 
Going down a hill a 12 kg sled has a force of 36 N. What is it's acceleration? 

• 2 m/s2
• 3 m/s2
• 432 m/s2
• 0.33 m/s2

Tags

NGSS.MS-PS2-2

F=Ma
An object of mass 300 kg is observed to accelerate at the rate of 4 m/s².  Calculate the force required to produce this acceleration. 

• 75 N
• .013 N
• 1200 N
• 2 N

Tags

NGSS.MS-PS2-2