A 25 N box is pulled vertically upward by means of a cord.Find the acceleration of the box if the tension in the cord is 35 N.

net force=ma

35-25=ma
mass m=25/g
a=10g/25 m/s^2

To find the acceleration of the box, we can use Newton's second law of motion which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = m * a).

Here's how we can solve this problem step by step:

Step 1: Determine the mass of the box.
The weight of the box is given as 25 N. The weight of an object is equal to the mass of the object multiplied by the acceleration due to gravity. Since the box is being pulled vertically upward, the net force on it must be in the opposite direction as the weight. Therefore, we have:
net force = tension - weight
35 N - 25 N = mass * acceleration due to gravity

Step 2: Calculate the net force.
Substituting the values into the equation from step 1:
10 N = mass * acceleration due to gravity

Step 3: Find the acceleration.
From step 2, we know that the net force on the box is 10 N. Using Newton's second law, we have:
net force = mass * acceleration
10 N = mass * acceleration

Rearranging the equation to solve for acceleration:
acceleration = net force / mass
acceleration = 10 N / mass

Step 4: Substitute the given values.
Substituting the given values into the equation:
acceleration = 10 N / mass

Since the mass of the box is not given in the question, we are unable to calculate the acceleration without this information.