A passenger jet flies from one airport to another 1273 miles away in 2.7 h. Find its average speed.
1 answer:
Answer:
Average speed of passenger jet
Explanation:
Let s be the average speed of the passenger jet.
Given:
Distance from one airport to another airport
Total time taken
We need to find the average speed of the passenger jet.
Solution:
Average speed formula:
The ratio of the total distance travelled by the object to the time taken to cover that distance.
Substitute total distance and time value in above equation.
Therefore, the average speed of the passenger jet is .
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Answer:
The unbalanced force that caused the ball to stop was friction
Explanation:
As Newton's second law states, the acceleration of an object is proportional to the net force applied on the object:
therefore, in order to move at constant speed, an object should have a net force of zero (balanced forces) acting on it.
In this case, the ball slows down and eventually comes to a stop: it means that the ball is decelerating, so there are unbalanced forces (net force different from zero) acting on it. The unbalanced force acting on the ball is the friction: friction is a force against the motion of the object, which is due to the contact between the surface of the ball and the surface of the street, and this force is responsible for slowing down the ball.