# data[].attributes.body
1. Define - velocity, force, inertia, acceleration.   (any two)

2.  When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then the retardation will be:

3. Write an example of newtons first law of motion.

4. A particle moving with an initial velocity of 5m/s is subjected to a uniform acceleration of 2.5m/s2. Find the displacement in the next 4 sec.?

# data[].attributes.body
1. A velocity of a body is the distance travelled per second by the body in a specified direction.
Acceleration is the rate of change of velocity with time.

# data[].attributes.body
1. Velocity is speed with direction.
Force is a push or pull which acts          when two things are in contact with each  other.

2. a=v-u/t
= 0-10/20
= -10/20
= -0.5
Therefore, the retardation is 0.5m/s^2.

3. When we are standing in a bus and the driver suddenly applies breaks we move forward this is due to inertia.

4. s=ut+1/2at^2
= 5*4 + 1/2*2.5* 4^2
= 20+ 20
= 40m

# data[].attributes.body
1. Velocity - It is the rate of change of the object in its position in unit speed.
Acceleration - change of velocity of an object with respect to time.
3. Brakes applied by a bus driver abruptly.
2. u = 10 m/s
v = 0 m/s
t = 20 s
a = v - u/t
= 0 - 10/20
= - 10/20
= - 0.5
4. s = ut + 1/2 at ^2
5*4 + 1/2 * 2.5

# data[].attributes.body
1.Velocity of an object  is the rate of change of its position in unite time or s+peed with its direction.
Acceleration- is the rate of change  of velocity in unite time.
2.a=v-u/t
=10/20
10/20
0.5
the retardation is 0.5m/s^2
3.When we are standing in a bus and driver suddenly applies break we move forward this is due to the law of inertia.
4.S=ut+1/2^2
=5*4+1/2*2. 5* 4^2
= 20+20
= 40m

# data[].attributes.body
Q 1
1 Velocity is a speed with direction. 2 Force is  a pull or push acts when two things are in contact with each other.
Q 2
a=v-u/t
=0-10/20
=10/20
=0.5
therefore the retardation is 0.5/s^2
Q3
when we are standing in a bus and driver suddenly applies breake we move forward this is due to inertia
Q4 s=ut+1/2at^2
=5*4+1/2*2.5*4^2
=20+20
=40m

# data[].attributes.body
1.A forces is a push or pull upon an object resulting from the object interaction with another object
2. v=o U=10m/s  T=20s
A = v-u/t
A = 0 - 20 / 10
A = 0.5
3. If you use the same forces to push a truck and push a car the car has less mass
4 . s=5 x 4 + .5x2.5x4^2
s=20 + 20 = 40

# data[].attributes.body
1.velocity is speed with direction and force is a push or pull which acts on two things which are in contact with each other.
2. a=v-u/t
=0-10/20
=-10/20
=-0.5
so, retardation is 0.5m/s^2
3. when a boy is cycling and suddenly car comes in front and he pushes his brakes and cycle stops so his body is pushed forward this is due to inertia
4. s=ut+1/2at^2
=5x4+1/2x2.5x4^2
=20+20
=40m

# data[].attributes.body
1.Force- It is a push or pull exerted on an object that results in the contact of two objects.
Acceleration- Change in velocity of an object per unit time.

2.Acceleration=v-u/t
v= 0
u=10
t= 20m/s
= 0-10/20
=-10/20
= -0.5 m / s2

3. An object which is stationary  will not move  unless an outside force is applied to it.

4. s= ut+ 1/2at2
u= 5
v= 4
a=2.5
t= 4
= 5x4 + 1/2x 2.5x42
=20+20
=40m

# data[].attributes.body
U = 10 m/s
V = 0 m/s
T = 20 s
- a = ?
Solution : a = v - u / t
0 - 10 / 20
= - 10 / 20
= - 5 m/s^2

# data[].attributes.body
1. Velocity:-  Velocity is seed with direction.
Force :-  Is a push or pull when 2 objects contact with each other.

2.  0.5m/s
U=10m/s
V=0m/s
T=20s
a=(V-U) / t
a=0-10/20
a= -0.5 m/s^2

3. The motion of a ball falling down through the atmosphere, or a model rocket being launched up into the atmosphere are both examples of newton first law.

4. u=5 m/s    a = 2.5m/s.       t =4s
a =ut +1/2 at^2
a=5 x 4 + 1/2 (2.5)(4)^2=0m

# data[].attributes.body
1)  Velocity- change of position of a body in a direction
Force- a push or pull which results in the interaction of objects
2)

# data[].attributes.body
Q.no 1
1.Velocity is the rate at which the position changes.
2.   Force is a push or pull which ats when two things are
contact with each other
3. Inertia, property of a body by virtue of which it         opposes any agency that attempts to put it in motion
4.Acceleration, rate at which velocity changes with time

# data[].attributes.body
3. An object will not change its motion or stay at rest unless acted upon an external unbalanced force.
A ball when kicked will not change its motion or stop when it is in motion unless frictional force acts upon it.

# data[].attributes.body
Q.No 2 a=v-u/t
=0-10
=-10/20
=-0.5

# data[].attributes.body
Q.No 3 Place a ball in a box and slowly push the box

# data[].attributes.body
4. s = ut + 1/2 at ^ 2
= 5*4 + 1/2 * 2.5 * 4 ^ 2
= 20 + 20
= 40 m

# data[].attributes.body
Q.No 4
S=ut+1/2
=5x4+1/2x2.5x4^2
=20+20
=40m