Question 14 with explanation and without graphical method
Question 14 with explanation and without graphical method
Yash Raniwal , 6 Years ago
Grade 12th pass
Mechanics> Question 14 with explanation and without ...
1 Answers
Arun
Dear Yash
3 stages of motion: acceleration, constant velocity, deceleration
deceleration:
vf=vi+at
0 m/s = 24 m/s + (-4 m/s2)t
t=6 s
Δx =vi*t + 1/2* a* t2
Δx=(24m/s)(6s)+1/2 *(-4 m/s2)(6s)2
Δx=72 m
acceleration and constant velocity
time for acceleration t1 and constant velocity t2
t1+t2=50
distance for acceleration d1 and constant velocity d2
d1+d2=960
d1 = (vi+vf)/2)*t1
d1 = (0+24)/2)*t1
d1 = 12 m/s * t1
d2 = 24 m/s * t2
960 = 12 m/s * t1 + 24 m/s * t2
960 = 12 m/s *(50-t2) + 24 m/s * (t2)
960 = 12 m/s *t2 + 1200
360 = 12 m/s *t2
t2=30 s
t1=20 s
solve for a
vf = vi +at
24 m/s = 0 m/s + a (20 s)
a = 1.2 m/s2
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Other Related Questions on mechanics
Three identical balls are placed on a frictionless
horizontal surface touching each other. They stick to
each other because of adhesive. Another ball of same
radius and mass m is placed over the void created by
the three balls. Find the forces applied by the balls
kept on the floor to each other if the system remains
in equilibrium.
Three identical balls are placed on a frictionless
horizontal surface touching each other. They stick to
each other because of adhesive. Another ball of same
radius and mass m is placed over the void created by
the three balls. Find the forces applied by the balls
kept on the floor to each other if the system remains
in equilibrium.
mechanics
1 Answer Available
Last Activity: 8 Months ago
A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.
11
21
31
41
A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.
11
21
31
41
mechanics
1 Answer Available
Last Activity: 8 Months ago
A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mmat the free end, where a small mass of 2 g is positioned. determine(i) The velocity of the end when passing through the zero position(ii) The acceleration at maximum displacement(iii) The maximum kinetic energy of the mass
A metal strip clamped at one end vibrates with a frequency of 20 Hz and amplitude of 5 mm
at the free end, where a small mass of 2 g is positioned. determine
(i) The velocity of the end when passing through the zero position
(ii) The acceleration at maximum displacement
(iii) The maximum kinetic energy of the mass
mechanics
2 Answers Available
Last Activity: 3 Years ago
An object of mass m = 0.25 kg oscillates in a fluid at the end of a vertical spring of springconstant kH = 85 N/m, see Fig.1. The effect of the fluid resistance is governed by thedamping constant b = 0.07kg/s.(i) Find the period of the damped oscillation.(ii) By what percentage does the amplitude of the oscillation decrease in each cycle?
An object of mass m = 0.25 kg oscillates in a fluid at the end of a vertical spring of spring
constant kH = 85 N/m, see Fig.1. The effect of the fluid resistance is governed by the
damping constant b = 0.07kg/s.
(i) Find the period of the damped oscillation.
(ii) By what percentage does the amplitude of the oscillation decrease in each cycle?
mechanics
1 Answer Available
Last Activity: 3 Years ago
If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0
If a=x² find the displacement at t =3sec if body velocity at t= 0 sec is 0
mechanics
1 Answer Available
Last Activity: 3 Years ago