ม5 Newton's Second Law

An object's velocity can be changed by changing its speed, its direction, or both.

• True
• False

Tags

NGSS.MS-PS3-1

A change in velocity over time is called ___________.

• speed
• force
• acceleration
• direction

Newton's second law of motion describes acceleration as force divided by __________.

• mass
• inertia
• speed
• direction

Tags

NGSS.MS-PS2-2

The direction of the force that pulls an object in a circular motion is toward the ___________ of the circle.

• outside
• center
• left side
• right side

What are the appropriate units to describe acceleration?

• m/s
• m/s²
• cm
• there are no units associated with acceleration

A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.

• 2.2m/s²
• 7.0m/s²
• 5.7m/s²
• 70m/s²

Tags

NGSS.MS-PS2-2

A force of 200 N is exerted on an object of mass 40 kg that is located on a sheet of perfectly smooth ice.Calculate the acceleration of the object.

• 5 m/s²

• 8000 m/s²

• 0.2 m/s²

• 1.32 m/s²

Pick the term that matches the statement;

'The train left the station heading towards the city at 75 mph north.'

• Speed

• Acceleration

• Velocity

• Inertia

Why is the net force 0 in the image?

• Because the elephants are the same size
• Because they are both pulling the same amount of force in opposite directions
• Because they are elephants
• Because they are pulling away from each other.

Tags

NGSS.MS-PS2-1

If a 10 kilogram object accelerates suddenly at 15 m/s², how much force was applied to the object?

• 150 Newtons

• 15 Newtons

• 150 kilograms

• 100 kilograms