Physics X ICSE
Quiz by Chetna Thakkar
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- Q1
The turning effect produced in a rigid body around a fixed point by the application of force is called
moment of couple
turning force
moment of force
none of these
30s - Q2
. The condition for equilibrium is
neither (a) nor (b)
the resultant of all the forces acting on the body be zero only
the resultant of moments of all the forces acting on the body about the turning point should be zero
both (a) and (b)
10s - Q3
The earth revolving around the sun is in ……… equilibrium
gravitational
centripetal
static
dynamic
10s - Q4
The centre of gravity of a cricket ball is at
at any point on its surface
its topmost point
at its bottom touching the ground
its geometrical centre
10s - Q5
What is the relation between Nm and dyne cm?
1 Nm = dyne cm
1 Nm = dyne cm
1 Nm = dyne cm
1 Nm = 100 dyne cm
10s - Q6
A steering wheel of diameter 1.5 m is rotated anti-clockwise by applying two forces each of magnitude 10 N. The moment of forces applied on it is ?
12 Nm
10 Nm
15 Nm
18 Nm
10s - Q7
. Which one of the following statements about the moment of a force or torque is correct? (a)
It is dependent only on the perpendicular distance from the axis of rotation to the line of action of force.
The moment of a force or torque about a given axis is dependent only on the magnitude of the force applied.
Torque or moment of force is the measure of the capacity of a force to turn a bod
It is dependent neither on the force nor on the perpendicular distance of the force from the axis
60s - Q8
In a uniform circular motion
the motion of a body accelerated
both (b) nor (c)
the velocity of the body continuously changes because direction of motion changes
speed of the body continuously changes.
10s - Q9
Which of the following quantities is constant for a body in uniform circular motion?
Acceleration
Velocity
Momentum
Speed
10s - Q10
. A force of 500 N produces a momentum of force of 400 Nm. What is the shortest distance between the point of application of force and turning point? (a)
1.8 m
0.8 m
1.2 m
10 m
10s - Q11
The centre of gravity of a cylindrical body is
out side the body
at the geometrical centre
at its bottom
at the mid-point on its axis
10s - Q12
A body is acted upon by two unequal forces in opposite direction, but not in one line. The effect is that
the body will have only the rotational motion
the body will have rotational as well as translational motion
the body will have neither rotational nor translational motion
the body will have only the translational motion
10s - Q13
In order to rotate a bar pivoted at its mid-point, we need to apply
a large force on any point on the bar
two unequal forces at the two ends but in the opposite direction
two unequal forces at the two ends but in the same direction
a small force exactly at the mid-point where it is pivoted
10s - Q14
The moment of couple can be defined mathematically as the ___
product of two forces and the perpendicular distance between them
product of one force and the perpendicular distance between the two forces
none of the above
product of one force and perpendicular distance between the point of application of force and turning force
10s - Q15
Steering the wheel of a motor car is an example of
rotational motion
translational motion
linear motion
circular motion
10s