A body can undergo the following types of motion except
random
rotational
translational
relative
Correct answer is D
Relative motion is the calculation of the motion of an object with regard to some other moving object. Hence, relative motion is not a type of motion.
The angle at which a projectile must be fired to cover maximum range is
30°
45°
60°
90°
Correct answer is B
The formula is \(\frac{v^{2}sin2\theta}{g}\)
And the sine graph is highest at 1 with its inverse as 90°. Hence, \(2\theta\) = 90°
\(\theta\) = 45°
50.0m
28.8m
18.0m
8.0m
Correct answer is D
Convert velocity from \(kmh^{-1}\) to \(ms^{-1}\), by multiplying \(\frac{1000}{3600}\),
\(72 \times \frac{1000}{3600}\) = \(20ms^{-1}\)
Therefore, distance covered in 0.4s = \(20 \times 0.4 = 8m\)
I
II
III
IV
Correct answer is B
No explanation has been provided for this answer.
A chemical balance is used for measuring
volume
mass
thickness
density
Correct answer is B
It is a type of beam balance with great precision, and it can pick up the slightest mass placed on it.
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