Answer:
The acceleration of the box is 1.125 m/s² towards right.
Explanation:
Mass of the box,
kg
Force acting towards right,
N
Frictional force acting towards left,
N
Let the acceleration be
m/s².
Now, net force acting on the box towards right is given as:

From Newton's second law of motion,

Therefore, the acceleration of the box is 1.125 m/s² towards right.
V = p / m
V = 1000 / 2.5
V = 400 m/s
hope this helps!
Answer:
Balances and Scales
A balance compares an object with a known mass to the object in question. One example of a balance is the triple beam balance. The standard unit of measure for mass is based on the metric system and is typically denoted as kilograms or grams.
Answer:
https://www.khanacademy.org/science/physics/geometric-optics/lenses/v/convex-lenses
Explanation:
Here is a link to a video to tell you about this.