Answer:
the acceleration of the car is -4.9m/s2.
the direction is opposite to the actual direction, since the acceleration is negative.
Answer:
fluids
Explanation:
the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
Answer:
a).
The magnitude force impulse is

the average force is

Explanation:
Using the conservation energy the potential energy in the high is equal to the kinetic energy just before the collision so:


Notice the mass can be cancel as a factor so:



Now the impulse is determinate by:



The average force is also

