Web Analytics

You want to move a heavy box with mass 30.0 kg across a carpeted floor. you pull hard on one of the edges of the box at an angle 30∘ above the horizontal with a force of magnitude 240 n, causing the box to move horizontally. the force of friction between the moving box and the floor has magnitude 41.5 n . what is the box's acceleration just after it begins to move?

Verified Answer :

240 cos 30 - 41.5 = 30a
240*1/2 - 41.5 = 30a
120 - 41.5 = 30a
30a = 78.5
a = 78.5/30 = 2.62 m/s^2

The magnitude of the acceleration of the box is about 5.54 m/s²

\(\texttt{ }\)

Further explanation

Newton's second law of motion states that the resultant force applied to an object is directly proportional to the mass and acceleration of the object.

\(\large {\boxed {F = ma }\)

F = Force ( Newton )

m = Object's Mass ( kg )

a = Acceleration ( m )

Let us now tackle the problem !

\(\texttt{ }\)

Given:

mass of box = m = 30.0 kg

magnitude of force = F = 240 N

direction of force =

frictional force = f = 41.5 N

Asked:

acceleration of the box = a = ?

Solution:

We will use Newton's Law of Motion to solve this problem as follows:

\(\Sigma F_x = ma\)

\(F_x - f = ma\)

\(F \cos \theta - f = ma\)

\(240 \cos 30^o - 41.5 = 30.0a\)

\(120 \sqrt{3} - 41.5 = 30.0a\)

\(\boxed{a \approx 5.54 \texttt{ m/s}^2}\)

\(\texttt{ }\)

Learn more

  • Impacts of Gravity : https://brainly.com/question/5330244
  • Effect of Earth’s Gravity on Objects : https://brainly.com/question/8844454
  • The Acceleration Due To Gravity : https://brainly.com/question/4189441
  • Newton's Law of Motion: https://brainly.com/question/10431582
  • Example of Newton's Law: https://brainly.com/question/498822

\(\texttt{ }\)

Answer details

Grade: High School

Subject: Physics

Chapter: Dynamics

View image johanrusli