A :-) For this question , we should apply
v = u + at
Given - u = 40 m/s
a = 2.5 m/s^2
t = 12 sec
Solution -
v = u + at
v = 40 + 2.5 x 12
v = 40 + 30
v = 70 m/s

.:. The new speed is 70 m/s.
( speed = velocity ).

6 0

3 years ago

A man drags his suitcase for a 2.00m with a force of 10.0n. Determine the work done on the suitcase if, it is inclined at an ang

Lelu [443]

Answer:

17.32 J

Explanation:

Work = Fcos(theta)x

Work = (10cos30°)(2)

Work = 17.32 J

3 0

3 years ago

In the qualifying round of the 50-yard freestyle in the sectional swimming championship, Dugan got an early lead by finishing th

Brilliant_brown [7]

Answer:

$V_{average}$ = 2.471 yards/s

Explanation:

We can calculate the average velocity thus:

$V_{average} = \frac{D_{1}+D_{2} }{t_{1}+t_{2}}$

Where

$D_{1}$ : First 25 yards

$t_{1}$ : Time to travel $D_{1}$

$D_{2}$ : Seconds 25 yards

$t_{2}$ : Time to travel $D_{2}$

Thus

$V_{average} = \frac{25 + 25}{10.01 + 10.22}$

$V_{average}$ = 2.471 yards/s

7 0

3 years ago

The largest visible-light telescopes in the world use what device to collect as much light as possible before the light is broug

AlexFokin [52]

Answer:

Option C

Explanation:

Visible telescopes are the telescopes which are sensitive in the spectrum of the light in the visible range.

The visible light telescopes are of three types out of which the reflecting telescopes uses the mirror so as to collect light as much as it can.

Convex mirror is used in such telescopes to collect all the light that falls on it and then the mirror reflects the light back to the focus.

Thus the mirror acts a bucket of light for its collection and the helps to form the world's largest visible light telescope.

4 0

4 years ago