High School

A lamp has a mass of 8 kg. What is the weight of the lamp?

A. 93 N
B. 85 N
C. 78 N
D. 109 N

Answer :

Answer: 78 N

Explanation: Weight is the downward force acting on an object due to gravity.

[tex]w=m\times g[/tex]

w= weight of an object

m= mass of object

g= gravity = [tex]9.8 ms^{-2}[/tex]

[tex]w=8kg\times 9.8ms^{-2}=78.4kgms^{-2}=78Newton[/tex]

[tex](1kgms^{-2}=1N)[/tex]

78. g on earth is 9.8 m/s^2 so F=ma and plugging in gives you F=(8kg)(9.8m/s^2) which is closest to 78 N.