1Convert a gear reducer torque of 20000 inlb to a Nm and b N

1.Convert a gear reducer torque of 20,000 in-lb to a) N-m and b) N-mm

2. What do the following initialisms stand for: a) ips; b) fps; c) cgs; d) SI? What are the three base units in each system? What is a derived unit in each system.

Solution

sol:

1)

1 in-lb = 0.112984829333 N-m

20000 in-lb = 0.112984829333*20000 = 2259.69 N-m = 2259.69*103 N-mm

2) ips = impulse per second

fps = foot pound second

cgs = centimetre–gram–second

SI = Système Internationale or International System

Three base units in each system

CGS, MKS,SI units

Derived units:

1)Length in cgs = cm

Length in mks = m

length in SI = m

2)Time in cgs,MKS,SI = s

3) mass in cgs = g

mass in MKS = Kg

mass in SI = Kg