Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
As the pressure of a fluid increases, its viscosity
decreases
increases
increases then decreases
remains constant
Correct answer is B
No explanation has been provided for this answer.
0.4
1.0
0.8
0.5
Correct answer is D
Coefficient of friction μ = F/R = F/mg = 500/1000 = 0.5
∴ μ = 0.5
4m2
8m2
2m2
1m2
Correct answer is A
Pressure developed in the effort piston = F/a
∴F/a = 40/0.4 = 400/4 = 100Nm2
this pressure is transmitted to the larger piston of area A; => P = F/A
∴ 100 = 400/A
=> A = 400/100 = 4m2
I and II only
I, II, III, and IV only
I and III only
I, II and III only
Correct answer is B
No explanation has been provided for this answer.
1500N
500N
4166N
750N
Correct answer is A
efficiency = (M.A / V.R) x 100/1 => 60/100 = M.A/5
∴M.A = (60 X 5) / 100 = 3
But M.A = Load/Effort; => 3 = Load/500
∴Load = 500 x 3
= 1500N