P is the point of contact of a wheel and the ground .The radius of wheel is 1m .The wheel rolls on the ground without slipping .The displacement of point p when wheel completes half rotation is
2m
πm
-1
1/2
-1/2
1
A stone tied to the end of a string of 1m long is whiriled in a horizontal circle with a constant speed.If the stone makes 22 revolutions in 44s ,what is the magnitude and direction of acceleration of the stone?
π2/4 ms-2 and direction along the radius towards the centre
π2 ms-2 and direction along the radius away from centre
π2 ms-2 and direction along the radius towards the centre
π2 ms-2 and direction along the tangent to the circle
The vector sum of two forces is perpenticular to their vector differences,In that case,the forces
are not equal to each other in magnitude
cannot be predicted
are equal to each other
are equal to each other in magnitude
The maximum range of a gun of horizontal terrain is 16 km .If g =10 ms-2 .then muzzle velocity of a shell must be .
160 ms-1
200√2 ms-1
400 ms-1
800 ms-1
A bullet is fired a gun with a speed of 1000 m/s in order to hit a target 100 m away.At what height above the target should the gun be aimed ? (The resistance of air is negligible and g=10 m /s2)
5 cm
10 cm
15 cm
20 cm
00
450
900
1800
Which of the following is not a vector quantity ?
speed
Velocity
Torque
Displacement
A car runs at a constant speed on a circular track of radius 100 m, taking 62.8 s for every circular lap. The average velocity and average speed for each circular lap respectively is
0,0
0,10 m/s
10m/s,10m/s
10m/s,0
For angles of projection of a projectile at angles(450-θ) and (450-θ) ,the horizontal ranges described
by the projectile are in the ratio of
1:1
2:3
1:2
2:1