4 chapter - numericals || 9th class physics. || Turning Effect of Forces problems.
This video is related to 4 chapter Numericals of 9th class physics ( Turning Effect of Forces ).(Punjab textbook) @fanticer
0:09. 4.1 Find the resultant of the following
forces:
(i) 10N along x-axis
(ii) 6N along y-axis
(iii) 4N along with negative x-axis.
(8.5N making 45° with x-axis)
5:51. 4.2 Find the perpendicular components of
a force of 50N making an angle of 30°
with x axis. (43.3N, 25N)
9:05. 4.3 Find the magnitude and direction of a
force, if its x-component is 12N and y-
is 5N. (13N making 22.6°with x-axis)
11:29. 4.4 A force of 100N is applied perpendicu-
larly on a spanner at a distance of
10cm from a nut. Find the torque ⁰
produced by the force. (10Nm)
14:41. 4.5 A force is acting on a body making an
angle of 30° with the horizontal. The
horizontal component of the force is
20N. Find the force. (23.1N)
16:50. 4.6 The steering of a car 🚗 has a radius
16cm. Find the torque produced by
Find the torque produced by a couple
of 50N. (16Nm)
19:31. 4.7 A picture frame 🖼️ is hanging by two
vertical strings. The tensions in the
strings🧵 are 3.8N and 4.4N. Find the
weight of the picture frame. (8.2N)
23:16. 4.8 Two blocks of masses 5kg and 3kg
are suspended by the two strings 🧵
as shown. Find the tension in each
string. (80N, 30N)
28:00. 4.9 A nut has been tightened by a force of
200N using 10cm long spanner 🔧.
What length of a spanner is required
to loosen the same nut 🔩 with 150N
force? (13.3cm)
31:39. 4.10 A block of mass 10kg is suspended
at a distance of 20cm from the centre
of a uniform bar 1m long. What force
is required to balance it at its centre
of gravity by applying the force at the
other end of the bar? (40N)