The answer to this question is true
The force is going which ever way the person kicks the ball.
Answer:
change in momentum is (delta,p))= 2*m*v*sin(23) ,parallel velocity to the window remains unchanged ignore, perpendicular velocity changes by twice the initial perpendicular velocity as the hail stone changes direction with respect to the perpendicular . force=total(delta,p)/t
hence force=450*2*m*v*sin(23) /46, pressure =force/area=450*2*m*v*sin(23) /46*1.187
This is not fluid mechanics,
Just think about splitting the velocity in to vector components use elastic collision fact is energy is same after collision hence so is the speed ,use known equations.
Explanation:
Mechanical Advantage= output force/input force. So, 156/52=3. You're MA is 3.
<u>Answers</u>
Question 1
After adding the two numbers together, you will find a number. To determine the number of significant figures, count the digits from right to left. The zeros on the left end and the right end are not significant. The zeros between the non-zero digits are significant.
Question 2
A mete stick is shorter than the student. So by using it, she will be force to take the measurements twice then add then together to get her height. This increases the chances of making errors. To improve the accuracy she should change the measuring instrument and use a tape measure. This will allow her to make only one measurement.
Question 3
Volume = length × width × height
= 105 × 75 × 80.5
= 633,937.5 cm³
In scientific notation;
633,937.5 cm³ = 6.339375 × 10⁵ cm³