Newton's Laws of Motion - by Samar NAJJAR

If no force is applied on a moving object, then most probably the object will

• stop

• continue with the same speed

• increase its speed

• decrease its speed

The sum of two perpendicular vectors of same magnitude F is :

• 2F

• F√2

• zero

• F√3

The sum of two parallel vectors of same direction and same magnitude F is:

• 2F

• F√2

• F√3

• zero

Two parallel vectors of opposite directions but same magnitude F, the magnitude of their sum is:

• 2F

• zero

• F√2

• F√3

The acceleration at equilibrium is

• Positive

• Negative

• Zero

An object is moving with a constant speed, then the sum of forces is equal to

• ΣF=0

• ΣF = m.a

The force is a

• vector

• scalar

The magnitude of the frictional force is

• negative

• positive

• always zero

A ball is attached to a rope on a frictionless incline, the Tension is resisting the

• W

• Wx

• Wy

The frictional force of a 1.2Kg-block (μ=0.25) is

Take g=10 N/Kg

• f=4N

• f=3N

• f=2N

• f=1N