Question

The table shows the masses of four objects
Which object has a weight of about 22.5 N?
Object
Book
Rock
Box
Fish
Mass (kg)
1.1
2.3
4.5
the book
the rock
the box
the fish

Answer 1

Answer:

the rock

Explanation:

Answer 2

Answer: The correct answer is the rock.

Explanation:

Weight is defined as the force acting on an object due to the gravity. It is measured in Newtons.

The formula used to calculate weight of an object is given as:

$W=m\times g$     ......(1)

where,

W = weight of an object

m = mass of an object

g = acceleration due to gravity = $9.8m/s^2$

For the given objects:

• For Book:

Mass of book = 1.1 kg

Putting values in equation 1,we get:

$W=1.1\times 9.8=10.78N$

Weight of the book is 10.78 N

• For Rock:

Mass of rock = 2.3 kg

Putting values in equation 1,we get:

$W=2.3\times 9.8=22.5N$

Weight of the rock is 22.5 N

• For Box:

Mass of box = 4.5 kg

Putting values in equation 1,we get:

$W=4.5\times 9.8=44.1N$

Weight of the box is 44.1 N

Hence, the correct answer is the rock.