1
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
Motion of a particle is given by equation s = (3t3 + 7t2 + 14t + 8) m. The value of acceleration of the particle at t = 1 sec is
A
10 m/s2
B
32 m/s2
C
23 m/s2
D
16 m/s2
2
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
Two masses as shown in the figure are suspended from a massless pulley. The acceleration of the system when masses are left free is

AIPMT 2000 Physics - Laws of Motion Question 18 English
A
$${{2g} \over 3}$$
B
$${g \over 3}$$
C
$${g \over 9}$$
D
$${g \over 7}$$.
3
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
The width of river is 1 km. The velocity of boat is 5 km/hr. The boat covered the width of river in shortest time 15 min. Then the velocity of river stream is
A
3 km/hr
B
4 km/hr
C
$$\sqrt {29} $$ km/hr
D
$$\sqrt {41} $$ km/hr.
4
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
A body of mass 3 kg hits a wall at an angle of 60o and returns at the same angle. The impact time was 0.2 sec. The force exerted on the wall

AIPMT 2000 Physics - Laws of Motion Question 19 English
A
150$${\sqrt 3 }$$ N
B
50$${\sqrt 3 }$$ N
C
100 N
D
75$${\sqrt 3 }$$ N.