A 2 kg object is subjected to two forces, F with arrow1 = 2 N î - 1 N ĵ and F with arrow2 = 18 N î - 9 N ĵ. The object is at rest at the origin at time t = 0. (a) What is the object's acceleration? m/s2 î + m/s2 ĵ> (b) What is its velocity at time t = 12 s? m/s î + m/s ĵ (c) Where is the object at time t = 12 s? m î + m ĵ

A. 10 m/s² i - 5 m/s² j

B. 120 m/s i - 60 m/s j

C. 1440 m i - 720 m j

Explanation:

First, the vector sum of the forces:

F = 2N i - 1N j + 18N i - 9N j

F = 20N i - 10N j

A. Acceleration is given as

a = F/m

Where m = mass = 2 kg

a = (20N i - 10N j)/2

a = 10m/s² i - 5m/s² j

B. Velocity, v = a * t

When t = 12s

v = (10m/s² i - 5m/s² j) * 12

v = 120m/s i - 60 m/s j

C. Distance, d = v * t

d = (120m/s i - 60 m/s j) * 12

d = 1400m i - 720m j

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation:

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

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