Force and Acceleration

Forces that are equal in size but opposite in direction are called unbalanced forces. ____________________

• True

• False

Tags

NGSS.MS-PS2-2

If a net force acts on an object, the object may change speed, change direction or do neither.

• True

• False

Tags

NGSS.MS-PS2-2

Balanced forces acting on an object cause the object to accelerate.

• True

• False

Tags

NGSS.MS-PS2-2

According to Newton's second law of motion, a larger force acting on an object causes a greater____________________ of that object.

• acceleration

• force

• mass

Tags

NGSS.MS-PS2-2

When two forces act in the same direction on an object, the net force is found by ______________________ forces.

• adding

• opposing

• taking away

Tags

NGSS.MS-PS2-2

Acceleration depends on which two factors?

• mass and position

• net force and mass

• mass and velocity

• position and net force

Tags

NGSS.MS-PS2-2

Lizzie is pushing Alex on a scooter. Lizzie is pushing with 75 N of force to the left, and Alex is helping with 20 N to the left. What is the net force on the scooter?

• 95 N, to the right

• 95 N, to the left

• 55 N, to the right

• 55 N, to the left

Tags

NGSS.MS-PS2-2

Friction always acts in a direction _________________ to the direction of motion.

• opposite

• same

Two students are investigating the effect of forces on the motion of an object. The two students each push on a box, as shown in the picture. Even though the students are pushing the box very hard, the box does not move. What is one way that the students can make the box move?

• Both students can push with the same force

• One student can push with more force

• Both students can push on the same side

• Both choices b an c

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is Newton's Second Law?

• An object will not change its motion unless a force acts on it.

• The force on an object is equal to its mass times acceleration.

• When two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Tags

NGSS.MS-PS2-2