Question

An object of mass $2kg$ is sliding with a constant velocity of $4m/s$ on a frictionless horizontal table. The force required to keep the object moving with the same velocity is:

• A. $2\hspace{0.17em}N$
• B. $0N$
• C. $32N$
• D. $8N$

Answer 1

The correct option is B

$0N$

Step 1: Given data
The mass of the object $\left(m\right)=2kg$
The velocity of the object $\left(v\right)=4m/s$
Acceleration of the object $\left(a\right)=0m/s^2$(Since the rate of change of velocity is zero)
Step 2: Using the following formula we get-
$$\begin{gathered} F=ma \\ F=Force \\ m=mass \\ a=acceleration \end{gathered}$$

Step 3: Finding the value of force

By substituting the value of mass and acceleration.
$$\begin{gathered} F=\left(2\right)\times \left(0\right) \\ F=0N \end{gathered}$$

Hence the right answer is option B.