Answer:
5600N
Explanation:
Given parameters:
Mass of car = 700kg
Initial velocity = 10m/s
Final velocity = 30m/s
Displacement = 50m
Unknown:
Net force acting on the car = ?
Solution:
To find the force acting on a body, it is pertinent we know the mass and acceleration.
Force = mass x acceleration
Now;
Let us find the acceleration from the kinematics equations:
v² = u² + 2aS
v is the final velocity
u is the initial velocity
a is the acceleration
S is the distance
30² = 10² + (2 x a x 50)
900 = 100 + 100a
100a = 800
a = 8m/s²
Therefore;
Force = 700 x 8 = 5600N
Answer:
380000 km
Explanation:
The number is 380000
From the right
The first digit is the ones place
The second digit is the tens place
The third digit is the hundreds place
The fourth digit is the thousands place
The fifth digit is the ten thousands place
The sixth digit is the hundred thousands place
While reading a number we read the first digit on the left and add which place it is at.
Then the next digit as well as the place it is at.
Here the 3 is at the hundred thousands place. So, we say three hundred.
Then we read the next digit which is 8 and is at the ten thousands place.
So, we say three hundred and eighty thousand
Answer:
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