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3 years ago

The truck is described as travelling at 30mph to the west. The quantity described here is a(n)

Physics

1 answer:

garik1379 [7]3 years ago

8 0

whats up

The correct answer is B velocity

Velocity means a speed of an object in this case the truck traveling in a given direction.

If my answer did help please mark me as brainliest thank you and have a great day!

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A car travels 90 meters north in 15 seconds. Then turns around and travels at 40 meters south in 5.0 seconds. what is the averag

Viefleur [7K]

Average velocity = (displacement) / (total time)

Displacement = distance and direction between
the starting point and the end point

The car travels 90 meters north, then 40 meters south.
So it ends up 50 meters north of where it began.

Displacement = 50 meters north
Total time = (15 + 5) = 20 seconds

Average velocity = (50 meters north) / (20 seconds)

= 2.5 m/s north

4 0

3 years ago

Will each of the following actions increase the distance between the diffraction spots? a) Increase the distance between the scr

diamong [38]

Answer:

A) no

B) no

C) yes

D) no

E) yes

5 0

3 years ago

A 2430 pound roller coaster starts from rest and is launched such that it crests a 105 ft high hill with a speed of 59 mph. The

Rudik [331]

Answer:

Explanation:

Given

Weight of roller coaster is $W=2430\ pound$

mass of roller coaster $m=\frac{W}{g}=\frac{2430}{32.2}=75.45$

Distance traveled by roller coaster $d=396\ ft$

drag force $f_d=85\ pounds$

velocity at top $v=59 mph\approx 86.53\ ft/s$

Suppose E is the initial energy

Conserving Energy at bottom and top

$E=\frac{1}{2}mv^2+mgh+f_d\cdot d$

$E=0.5\times 75.45\times 86.53^2+2430\times 105+85\times 396$

$E=2.9\times 10^5\ foot-pound$

5 0

3 years ago

In the 2008 Olympics, Jamaican sprinter Usain Bolt shocked the world as he ran the 100-meter dash in 9.69 seconds. Determine Usa

-Dominant- [34]

Answer:

His average speed was 10.3199 m/s.

Explanation:

4 0

4 years ago

If two different theories describe experimental observations equally well, can one be said to be more valid than the other (assu

Andreas93 [3]

Answer:

Explanation:

In such situations we cannot determine which one is more valid as both serves the purpose well.

Two theories are carried out in different environment and circumstance keeping different parameters and one can opt for any number of ways to carry out that experiment but what matter at the end is the accuracy they bring.

Each of the theory is a new discovery and follows all the possible logical rules hence it is not possible to decide which one is more valid.

3 0

3 years ago