Newton's laws

Newton's first law is about which phenomenon?

• Magnetic field

• Action reaction

• Accelerated motion

• Inertia

The second law of Newton is...

• F=kx

• F=ma

• F=PS

• F=-F

If we increase mass three times, force will

• increase three times

• decrease three times

• not change

• increase two times

If we increase mass two times, acceleration will

• Increase two times

• not change

• decrease two times

• decrease four times

If mass is 200g and acceleration is 3 m/s², find force.

• 600N

• 67N

• 0.6N

• 60N

If force is 20N and acceleration is 4 m/s², find mass of the object.

• 80

• 0.2

• 5

• 15