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.
250J
1000J
10 000J
100 000J
Correct answer is B
P.E = K.E = mgh
= 50 x 10 x 2 = 1000J
The energy is costant but the linear momentum varies
The linear momentum is conatant but the energy varies
both energy and linear momentum are constant
The speed and the linear velocity are both constant
Correct answer is C
No explanation has been provided for this answer.
A motor vehicle is brought to rest from a speed of 15ms-1 in 20 seconds. Calculate the retardation.
0.75ms-1
1.33ms-2
5.00ms-2
7.50ms-2
Correct answer is A
Retardation = \(\frac{u - v}{t}\)
= \(\frac{15 -0}{20}\)
= 0.75ms-1
20m
80m
160m
320m
Correct answer is B
max. height = \(\frac{U^2\sin^2\theta}{2g}\)
= \(\frac{80 \times 80 \times \sin^2(30)}{2 \times 10}\)
= 80m
1.3ms-1
10.0ms-1
50.0ms-1
70.0ms-1
Correct answer is C
No explanation has been provided for this answer.