Question

which is acceleration? *
a change in position
a change in time
a change in velocity
a change in weight
objects remain at rest or in motion unless they experience an unbalanced ______
acceleration
displacement
force
velocity
a 4kg object has an acceleration of 6 m/s^2. what is the net force on the object?
f = (m)(a)
24 n
10 n
2 n
1.5 n

Explanation:

First Question:

To determine which is acceleration, recall the definition: acceleration is the rate of change of velocity. A change in position is displacement, a change in time is just time variation, and a change in weight relates to force/mass changes, not acceleration. So the correct option is the one about change in velocity.

Newton's first law states that objects remain at rest or in uniform motion unless a net (unbalanced) force acts on them. Acceleration is a result of force, displacement is position change, and velocity is speed with direction—none fit the law's blank except force.

Step1: Identify formula and values

The formula is \( F=(m)(a) \), where \( m = 4\,\text{kg} \) and \( a = 6\,\text{m/s}^2 \).

Step2: Substitute values

Substitute \( m = 4 \) and \( a = 6 \) into the formula: \( F=(4)(6) \).

Step3: Calculate

\( 4\times6 = 24 \), so \( F = 24\,\text{N} \).

Answer:

C. a change in velocity

Second Question: