1. A particle is moving in a circular path of radius r. The displacement after half a circle would be.
(a) zero
(b) πr
(c) 2r
(d) 2πr
2. If the displacement of an object is proportional to square of time, then the object moves with-
(a) Uniform velocity
(b) Uniform acceleration
(c) Increasing acceleration
(d) Decreasing acceleration
3. A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is.
(a) u/G
B. U'2/2g
c. u'/g
d. u/2g
4. What is the SI unit of momentum?
(a) kgms
(c) kgms!
(b) ms/kg
(d) kg/ms
5. What is the numerical formula for force?
(a) F=ma
(b) F = m/a
(c) F= ma'2
(d) F = a'2 m
Answers
Answer:
1) πr
2) uniform velocity
3) u'2/2g
4) kgm/s
5) F= ma
Answer:
Here your answer with full explaination
(1) ans. (c) 2r
Displacement at half path is the shortest distance between the initial and final point.
So, it's equal to twice the radius of the circle =2r
(2) ans. (b) Uniform acceleration
When the rate of change of velocity with time of a body is constant then the object is said to be uniformly accelerated.
Or in other words in uniform acceleration, the displacement of an object is proportional to square of time.
(3) ans. (b) u^2/2g
(b) Given, initial velocity = u, height = h and a = g (acceleration due to gravity)
At the highest point, final velocity becomes zero i.e., v = 0
From, third equation of motion,
(4) ans. (d) kg/ms^-1
Impulse (I) imparted to the body is equal to the change in linear momentum (Δp) of the body.
Impulse I=Δp
Thus momentum has the same units as that of impulse.
Since momentum has SI unit as kg m/s, thus impulse also has SI unit as kg m/s.
(5) ans. (b) F=m/a
The formula for force says force is equal to mass (m) multiplied by acceleration (a). If you have any two of the three variables, you can solve for the third. Force is measured in Newtons (N), mass in kilograms (kg), and acceleration in meters per second squared ( m/s2 ).
PLEASE MARK ME AS BRAINLIST AND FOLLOW ME PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!