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.
300 N
200 N
150 N
100 N
Correct answer is A
Thrust = pressure x area = 100 pa x 3 m2 = 300 N
If a wire 30 cm long is extended to 30.5 cm by a force of 300 N. find the strain energy of wire
0.75 J
7.50 J
75.00 J
750.00 J
Correct answer is A
Energy stored in a stretched wire (strain energy)
= average force x extension
= (1)/2 Fe
= (1)/2 x 300 N (30.5 - 30.0) x 10-2 m
= (300)/2 x 0.5 x 10-2 = 0.75J
55.6 %
50.0%
33.3%
22.2%
Correct answer is C
Efficiency = (MA)/V.R x 100% = (load)/Effort x (1)/V.R
= (800)/400 x (1)/6 x 100% = 33.3%
The surfaces of conveyor belts are made rough so as to?
protect them while carrying loads
prevent the loads from slipping
enable them to carry more load
make them stronger
Correct answer is B
Rough surface promotes friction. Therefore, roughness of conveyor belt prevents the load from slipping
2 ms-2
5 ms-2
20 ms-2
25 ms-2
Correct answer is A
Acceleration = (increase in velocity)/time taken
= (45 - 25)/10 = (20)/10 = 2ms-2