Answer:
hope it helps brainliest pls. and the answer is the one that is circled in red color.
Explanation:
Given:
u(initial velocity):9.6 m/s
at the maximum height final velocity =0
The acceleration acting on the body is gravity as it is free falling object
=-9.8m/s^2
Now we know that
v^2-u^2 = 2as
Where v is the final velocity measured in m/s
u is the initial velocity which is measured in m/s
a is the acceleration measured in m/s^2
s is the distance traveled by the rock in this case it is considered as the height
Substituting these values we get
0-9.6= 2 x -9.8 x s
s= 0.49 m
Consider t as the time taken for the rock to travel
v=u+at
0=9.6 -9.8t
t=0.98sec
Answer:
The time it will take for the driver to reach Ottawa is 3 hours 32 minutes and 45 seconds
Explanation:
The given parameters are;
Speed of the car = 120 km/h
Distance from Toronto to Ottawa = 425.5 km
The formula for speed is given as follows;
Speed = Distance/Time
Therefore, to find the time duration it takes from Toronto to Ottawa, we have;
Time duration = Distance from Toronto to Ottawa/(Speed of the car)
The time duration = 425.5/120 = 3.54583 hours = 212.75 min = 12765 seconds
The time it takes from Toronto to Ottawa while driving at 425.5 km/h = 12765 seconds.
2.5 watt
Explanation:
we know
power = work done /time
work done gainst gravity is = mgh
as mg = weight = force = 5 N
and height = 2 m
so work done = mgh = 5*2 = 10N
therefore ,
Power = 10/4 = 2.5 watt
Answer:
Option (4)
Explanation:
There are two types of collision.
Perfectly elastic collision: the collision in which the momentum and kinetic energy is conserved. There is no loss of energy in other forms of energy.
Perfectly plastic collision: The collision in which the momentum is conserved and kinetic energy is not conserved. The two bodies stick after the collision.
Here, the bullet hits the block and then embedded in the block, it is the example of plastic collision.
