Question

A poundal is the force required to accelerate a mass of 1 lb,m (pound mass) at a rate of 1 ft/s^2. 1 poundal 1 lb,m*ft/(s^2) Calculate the weight in poundals of an 148 lb,m object on Earth

Answer 1

Step-by-step explanation:

According to Newtons second law,

F = m × a

where, F = force acting on object

m = mass of object

a = acceleration

On Earth, a = g

where, g = gravitational acceleration constant = 9.8
`m/sec^(2)`

Now, convert g into
`ft/sec^(2)` as follows.

1 m = 3.280 ft

g =
`9.8 m/s^(2) * 3.280 ft/m`

= 32.144
`ft/s^(2)`

It is given that m = 148 lbm. Hence, calculate force as follows.

F =
`148 lbm * 32.144 ft/s^(2)`

= 4757.312
`lbm.ft/s^(2)`

= 4757.312 poundal

Thus, we can conclude that the weight in poundals of an 148 lbm object on Earth is 4757.312 poundal.