Question
Physics Question on Motion in a straight line
A man weighs 80 kg, he stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 m/s2. What would be the reading on the scale? (g=10 m/s2)
A
Zero
B
400 N
C
800 N
D
1200 N
Answer
1200 N
Explanation
Solution
Reading of weighing scale
= m(g+a)
= 80 (10+5)
= 80 x 15
= 1200 N
So, the correct option is (D): 1200 N