Dynamics Physics

It's an agent that causes or opposes changes in the motion of matter, or

tends to do so.

• Weight

• Mass

• Force

• Vector

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The sum of all forces on an object is called

• the weight vector.

• the resultant force.

• the equilibrant force.

• the reaction force.

Tags

NGSS.MS-PS2-2

What is the minimum number of forces that must act on a system in order to have an unbalanced force on the system?

• 1 force

• 2 forces

• 0 force

• 3 forces

Tags

NGSS.HS-PS2-1

According to Newton’s second law, doubling a net force on a system of constant mass will double...

• the mass

• the acceleration

• the force

• the magnitude

Tags

NGSS.MS-PS2-2

A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²

• 18 m/s²

• 16 m/s²

• 16 m/s

Tags

NGSS.HS-PS2-1

A drag racer accelerated from 0 m/s to 200 m/s in 5 s.  What was the acceleration?

• 0 m/s

• 40 m/s²

• -40 m/s²

• 40 m/s

Tags

NGSS.MS-PS2-2

A cannonball is fired with an initial velocity of 100. meters per second at an angle of 15.0° above the horizontal. What are the horizontal (v_x) and vertical (v_y) components of this velocity?

• 25.9 m/s

• 99.6 m/s

• 76.0 m/s

• 65.0 m/s

A cannonball is fired with an initial velocity of 100. meters per second at an angle of 15.0° above the horizontal. What are the horizontal (v_x) and vertical (v_y) components of this velocity?

v_x = ​ (a)  

v_{y =} ​ (b)  

• 25.9 m/s

• 99.6 m/s

• 76.0 m/s

• 65.0 m/s

Which scientist first stated the principle of inertia?

• Galileo Galilei

• Isaac Newton

• Albert Einstein

• James Prescott Joule

Objects in a state of motion (either moving or at rest) tend to remain that way. According to Galileo is the:

• Remaining State of Motion

• Natural state of Motion

• Acceleration of Motion

• Galilei State of Motion