Newton's Laws of Motion (Entrance Ticket 12-5-19)

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

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NGSS.MS-PS2-2

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

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.

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NGSS.MS-PS2-1

A student throws a ball against a wall.  Which statement best explains what is happening in the picture.

• The energy of the ball is destroyed as it strikes the wall.
• The energy of the ball becomes negative as it hits the wall.
• The force from the wall on the ball is equal and opposite to the force from the ball on the wall.
• The force exerted by the ball on the wall is greater than the force exerted by the wall on the ball.

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NGSS.MS-PS2-1

Object X has twice the mass of Object Y.  Both objects are accelerating at the same rate.  Which statement best describes the motions of Object X and Object Y.

• Object X is travelling at twice the speed as Object Y.
• Object X is travelling at half the speed as Object Y.
• Object X requires twice the force to accelerate at the same rate as Object Y.
• Object X requires half the force to accelerate at the same rate as Object Y.

Tags

NGSS.MS-PS2-2