1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
If an experiment four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively.

Quantity P is calculated as follows P $$ = {{{a^3}{b^2}} \over {cd}}$$ % error in P is
A
7%
B
4%
C
14%
D
10%
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
The velocity of a projectile at the initial point A is $$\left( {2\widehat i + 3\widehat j} \right)$$ m/s. It's velocity (in m/s) at point B is NEET 2013 Physics - Motion in a Plane Question 42 English
A
$$2\widehat i - 3\widehat j$$
B
$$2\widehat i + 3\widehat j$$
C
$$-$$$$2\widehat i - 3\widehat j$$
D
$$-$$$$2\widehat i + 3\widehat j$$
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
A uniform force of $$\left( {3\widehat i + \widehat j} \right)$$ newton acts on a particle of mass 2 kg. Hence the particle is displaced from position $$\left( {2\widehat i + \widehat k} \right)$$ metre to position $$\left( {4\widehat i + 3\widehat j - \widehat k} \right)$$ metre. The work done by the force on the particle is
A
13 J
B
15 J
C
9 J
D
6 J
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Change Language
An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12 m s$$-$$1 and the second part of mass 2 kg moves with 8 m s$$-$$1 speed. If the third part files off with 4 m s$$-$$1 speed, then its mass is :
A
7 kg
B
17 kg
C
3 kg
D
5 kg