8th Grade Physics

What amount of force is needed for a 15 kg horse to accelerate at 3 m/s² ?

• 5N
• 12N
• 45N

Tags

NGSS.MS-PS2-2

When Linh jumps forward off a skateboard, then the skateboard moves back.  This is an example of _____________.

• Newton's 3rd Law
• Newton's 2nd Law
• Newton's 1st Law

Tags

NGSS.MS-PS2-1

What amount of force is needed to push a 25 kg go-cart to accelerate at 5 m/s²?

• 125 N
• 5 N
• 20 N

Tags

NGSS.MS-PS2-2

What is the mass of a basketball that has a force of 10 N and that is passed at an acceleration of 0.5 m/s²?

• 5 kg
• 20 kg
• 9.5 kg

Tags

NGSS.MS-PS2-2

A kid riding a bike hits a curb and the bike stops, but the kid flies off the bike at the same speed the bike was moving.  This is an example of __________.

• Newton's Laws of Motion
• Newton's Laws of Mass
• Newton's Laws of Force

Tags

NGSS.MS-PS2-1

A ball rolling across the floor with friction acting in the opposite direction will change its motion according to _________.

• Newton's Law of Action-Reaction
• Newton's Law of Force
• Newton's Law of Inertia

Tags

NGSS.MS-PS2-2

_______________ includes the direction of an object in motion.

• Speed
• Velocity
• Density

Calculate the average speed of a boat that travels 600 meters in 30 seconds.

• 630 meters/second

• 570 meters/second

• 18,000 meter/second

• 20 meters/second

Tags

NGSS.MS-PS3-1

What is the net force of the rocket?

• 3200 N up

• 7800 N up

• 7800 N down

• 3200 N down

Tags

NGSS.MS-PS2-2

What is the net force of the boat?

• 1400N right

• 550N right

• 1400N left

• 550N left

Tags

NGSS.MS-PS2-2