Answer:
The acceleration of an object is 4 m/s².
Explanation:
The object is thrown from a building 100 meters above the ground, with an initial velocity of 10 meters per second and a flight time of 5 seconds.
It is required to find the acceleration of the object. Let a is the acceleration. Using second equation of kinematics to find it as :
So, the acceleration of an object is 4 m/s².
The impulse exerted on the ball by the wall is 24i kgm/s.
<h3>
Impulse exerted by the ball on the wall</h3>
The impulse exerted by the ball on the wall is the change in the linear momentum of the ball.
J = ΔP
ΔP = Pf - Pi
P = mv
where;
- m is mass of the ball
- v is the velocity
ΔP = 3(4.0i + 3.0j) - 3(-4.0i + 3.0j)
ΔP = (12i + 9j) - (-12i - 9j)
ΔP = 24i kgm/s
Thus, the impulse exerted on the ball by the wall is 24i kgm/s.
Learn more about impulse here: brainly.com/question/904448
#SPJ1
Knowing the distance covered and the time to cover the distance,
you can calculate the car's average speed during that time.
Average speed = (distance covered) / (time to cover the distance)
Average speed = (30 km) / (20 minutes) = 1.5 km/minute .
Note: You do NOT have enough information to calculate velocity.
Answer:
101.32 rounded to 1 significant figure is 100. 20.1234 rounded to one significant figure is 20, and 212.1 rounded to one significant figure is 200.
100 + 20 is 120, and 120 - 200 is -80.
Explanation:
Based on the question above, the colour that will appear are red and yellow filters respectively.
<h3>Red colour</h3>
- It is commonly used in landscapes. It will darken foilage, and will dramatically increase the contrast in cloudy skies.
<h3>Yellow colour</h3>
- It has a subtle effect - will darken skin slightly.
In conclusion, we can conclude that red and yellow filters should be used.
Learn more about colour filters here: brainly.com/question/883931