1
NEET 2013
MCQ (Single Correct Answer)
+4
-1
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 40 English
A
$$2\widehat i - 3\widehat j$$
B
$$2\widehat i + 3\widehat j$$
C
$$-$$$$2\widehat i - 3\widehat j$$
D
$$-$$$$2\widehat i + 3\widehat j$$
2
NEET 2013
MCQ (Single Correct Answer)
+4
-1
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
3
NEET 2013
MCQ (Single Correct Answer)
+4
-1
The upper half of an inclined plane of inclination $$\theta $$ is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and lower half of the plane is given by
A
$$\mu $$ = 2 tan$$\theta $$
B
$$\mu $$ = tan$$\theta $$
C
$$\mu $$ = $${1 \over {\tan \theta }}$$
D
$$\mu = {2 \over {\tan \theta }}$$
4
NEET 2013
MCQ (Single Correct Answer)
+4
-1
Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upwards at constant speed v. What is the net force on the block of mass 2m ? (g is the acceleration due to gravity)
NEET 2013 Physics - Laws of Motion Question 18 English
A
3mg
B
6mg
C
zero
D
2mg
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