Newton's Law of Motion

Two objects are connected by a rope over a pulley.  According to Newton's Second Law of Motion, the masses will start to move if the

• acceleration of object 1 is greater than acceleration of object 2
• acceleration of object 2 is greater than acceleration of object 1
• mass of object 1 is greater than the mass of object 2
• mass object 2 is greater than the mass of object 1

Tags

NGSS.MS-PS2-2

Which statement best explains Newton's Third Law of Motion?

• An object at rest tends to stay at rest.
• For every action there is an equal and opposite reaction.
• The acceleration of an object is based on the force applied.
• An object continues its motion until an unbalanced force is applied.

Tags

NGSS.MS-PS2-1

Which is the best example of Newton's First Law of Motion?

• a basketball thrown in the air falls to the ground
• a soccer ball remains motionless until it is kicked by a player
• a baseball player swings at an approaching ball
• an ice skater pushes back from a wall and moves backwards

An object is resting motionless on a surface. According to Newton's 1st Law, the object will only start to move if

• the net forces on the object equal zero
• an unbalanced force is applied to the object
• the upward force of the object is equal to its acceleration
• two forces that are equal and opposite are applied to the object

Tags

NGSS.MS-PS2-2

As the wheels of a train push down on the track, the track pushes back against the wheels. Which of Newton's laws is used to explain these forces.

• An object at rest tends to stay at rest unless acted upon by an unbalanced force.
• The net force of an object is its mass times its acceleration.
• For every action, there is an equal and opposite reaction.
• Any 2 objects exert a gravitational force of attraction on each other.

Tags

NGSS.MS-PS2-1