Answer:
768000 joule
Explanation:
As we know that
K.E = 0.5 x mv2
Here m stands for mass, the measure of how much matter is in an object, and v stands for the velocity of the object, or the rate at which the object changes its position.
putting the value we get
K.E = 0.5 x (1500KG)(32 m/s)2
K.E =768000 J
Answer:
average force is 138900 N
Explanation:
given data
speed = 50 km/h = 13.89 m/s
mass = 1500 kg
time = 0.15 s
to find out
average force
solution
we know initial velocity of car is positive
we will apply here equation to find force that is
Force x change in time that is equal to mass x change in speed ................1
so put here all value of mass, time and velocity in equation 1
Force x 0.15 = 1500 x ( -13.89)
force = 138900 N
so average force is 138900 N
Let's Calculate the displacement :
we know that displacement is the shortest distance between two points (i.e final position - initial position). so here displacement :
The answer is A. Authoritarian
Authoritarian parents don’t trust their children to make good choices. They tend to be controlling. They also don’t give children choices or options and are not willing to negotiate which is very restrictive.
Answer:
B. 30 m down
Explanation:
In physics we have two types of quantities:
- Scalar quantity: it is a quantity which only has a magnitude (e.g: mass and time are scalar quantities, since they only have a magnitude)
- Vector quantity: it is a quantity which has both a magnitude and a direction (e.g: velocity is a vector quantity, since it has a magnitude (the speed) and a direction)
In this problem, we have:
A. 100 ounces of water --> scalar (this is a volume, which has only a magnitude)
B. 30 m down --> vector (this is a displacement, which has both a magnitude (30 m) and a direction (down)
C. 88 mi/s --> scalar (this is a speed, which has only a magnitude)
D. 45 gallons in a bucket --> scalar (this is a volume, which has only a magnitude)
So, the correct option is B.
