Fisica 1,2

Newton law: the acceleration is directly proportional to the force and inversely proportional to the mass of thebody

• 2n laww

• 1st law

• 3rd law

• 4th law

Newton law: an object will remain at rest or in uniform motion in a straight line, unless acted upon an external force

• 2n laww

• 1st law

• 3rd law

• 4th law

Newton law: In every force of action, another equal and opposite force called reaction corresponds

• 2n laww

• 1st law

• 3rd law

• 4th law

change postion over time is

• Position

• velocity

• acceleration

change in velocity over time is

• Position

• velocity

• acceleration

If an object has an acceleration of -5 m/s2. Every second, it will

• Increase its velocity 5 m/s

• Decrease its velocity 5 m/s

• Increase its position 5 m

• Decrease its velocity 5 m/s

A car goes from 14 to 10 m/s from the initial time of 4 to final time of 7. Acceleration is:

• 4/3 or 1.33 m/s2

• -3/4 or -0.75 m/s2

• 3/4 or 0.75 m/s2

• -4/3 or -1.33 m/s2

A 10 kg box is pushed with a force of 50 N. Whats is its acceleration?

• 50 m/s2

• 3 m/s2

• 10 m/s2

• 5 m/s2

A 1500 kg car goes from rest to 25 m/s in 4 seconds. Whats the force used to do that.

• 1500 N

• 6.25 N

• 9375 N

• 100 N

Selec the option that is NOT a Free Fall characteristic

• Gravity is the only force acting, and is negative because points downwards

• Initial velocity is 0 m/s

• Initial position is 0 m

• Speed increases but in the negative side