1. Rushin is waiting at a stoplight. When it finally turns green, Rushin accelerated from rest at a rate of a 2.00
m/s2 for a time of 15 seconds. Determine the velocity of Rushin's car during this time period.
a. -30 m/s2
c. 7.5 m/s
b. 30 m/s2
d. 30 m/s
2. Ima is approaching a stoplight moving with a velocity of +30.0 m/s. The light turns yellow, and Ima applies
the brakes and skids to a stop. If Ima has an acceleration rate of 8.00 m/s2, determine the displacement of the
car during the skidding process.
56.3 m
cannot determine
b.
240 m
d.
a.
C.
4.3 m
3. A car slows down uniformly from a speed of 21.0 m/s to rest in 6.00 seconds. What was its average velocity?
How far did it travel in that time?
a. 10.5 m/s; 63 m
c. 10.5 m/s; 0.29 m
b. 21.0 m/s ;126 m
d. cannot determine
Ni

What is on your multiple choice anwers

Answerthe global climate during the paleogene departed from the hot and humid conditions of the late mesozoic era and began a cooling and drying trend which dispite having been periodically disrupted by warm periods such as the paleocene-eocene thermal maximum, persists today;

The figure is missing but we can answer anyway.the correct answer is "releasing the string". in fact, when the person is holding the bow and the arrow, the kinetic energy of the arrow is still zero (because the arrow is not moving). the moment the arrow is released, it acquires a velocity v, so its kinetic energy will become different from zero: where m is the mass of the arrow and v its velocity.  all the other options, instead, do not increase the kinetic energy of the system: -  pulling farther back on the string : this will just increase the elastic potential energy of the system-  holding the arrow higher: this will increase the gravitational potential energy of the system (which is given by u=mgh, where h is the height above the ground)-  decreasing the mass of the arrow: this will decrease the gravitational potential energy of the system (which is given by u=mgh, where m is the mass)