Question

A block of wood mass 2 kg and density 5000 kg per m3 is suspended from a string. What will be the tension in the string?

a. 9.8 N
b. 19.6 N
c. 39.2 N
d. 49 N

Answer 1

The tension in the string is equal to the weight of the 2 kg block of wood, which is calculated using the formula for weight as 19.6 N.

Step-by-step explanation:

In the scenario given, a 2 kg block of wood with a density of 5000 kg/m³ is suspended from a string. The tension in the string is equal to the weight of the 2 kg block of wood, which is calculated using the formula for weight as 19.6 N.

To find the tension in the string, we only need to calculate the weight of the block as the block is at rest and the tension will equal the weight. The weight (W) can be calculated using the formula W = m × g, where m is the mass of the block and g is the acceleration due to gravity (9.8 m/s²).

For this block, W = 2 kg × 9.8 m/s² = 19.6 N. Therefore, the tension in the string holding up the block would be 19.6 N, which corresponds to option b.