Answer:
C
Explanation:
Chemical reaction,physical
Answer:
The main force is wind or air
Explanation:
Answer:
B) Remains constant
Explanation:
The motion of the ball is the motion of a projectile, which consists of two separate motions:
- A horizontal motion with constant velocity, since there are no forces acting along the horizontal direction (if we neglect air resistance)
- A vertical motion with constant acceleration, due to the presence of the force of gravity (pointing downward), that accelerates the ball towards the ground with acceleration g=9.8 m/s^2.
We are only interested in the horizontal motion of the ball: we said that there are no forces acting along the horizontal direction, therefore the horizontal component of the the velocity of the ball is constant.
Answer:
The car that went 54 km in 2/3h was faster, 5/4 times faster than the other car
Explanation:
Average speed of a car is the ratio between the displacement and the time (t) it takes to do that displacement:
So, for the first car:
(1)
for the second car we have:
(2)
So, the second cart is faster than the first one. To find how many times divide speed 2 by speed 1: