All categories

3 years ago

Average speed is useful but it might not describe your actual speed

1 answer:

6 0

Average speed is useful in describing the motion of a body, but it does not tell everything about the motion. For instance, a car traveling at an average speed of 100 kilometers per hour during a certain hour could conceivably have traveled at 150 km/h for 40 minutes, Energy, Ch. 3, extension 1 Calculating average speed and velocity 3 then halted for the last 20 minutes as a patrolman gave the driver a ticket (picture above). Its average speed really does not describe that hour’s journey very well. The way to deal with such a situation is to take the average over a shorter interval, and do this more times. In the example given above, if the speed were sampled every 15 minutes instead of over the entire hour, we would list average speeds of 150 km/h at the start (0 to 15 minutes), 150 km/h (15 to 30 minutes), 100 km/h (30 to 45 minutes), and 0 km/h (45 to 60 minutes).

You might be interested in

Acid rain is the direct result of acid released by burning fossil fuels. T/F

disa [49]

Answer : False.

Explanation : Acid rain is the indirect result of burning fossil fuels. As the incomplete combustion of fossil fuels releases sulfur dioxide and nitrous dioxide in the air. When it rains it gets mixed with water and forms nitric acid and sulfuric acid which causes acid rain. Acid rain is harmful.

7 0

3 years ago

Read 2 more answers

A powerful motorcycle can produce an acceleration of 3.50 m/s2 while traveling at 90.0 km/h. At that speed the forces resisting

IrinaK [193]

Answer:1265 N

Explanation:

Given

acceleration of motorcycle $\left ( a\right )=3.5 m/s^2$

Velocity $\left ( v\right )=90 km/h\approx 25m/s$

Air friction and Friction $\left ( f\right )=425 N$

mass of the motorcycle with rider $\left ( m\right )=240 Kg$

Applying Forces on motorcycle

$F_{engine}-f=ma$

$F_{engine}=f+ma$

$F_{engine}=425+240\left ( 3.5\right )$

$F_{engine}=425+840=1265 N$

5 0

3 years ago

Vera and her three sisters received the same amount of money to go to the school festival. Each girl spent $12. Afterward, the g

rodikova [14]

Answer:

$18

Explanation:

Each of the was qiven $18

All together =24

24 divide it by 4 (because there were 4 people there)

= 6 (6+6+6+6)

= 24

=6+12=18

.Hence each of them was given $18

7 0

2 years ago

Help 10 points!

adell [148]

chemical energy into mechanical energy as well as heat.

3 0

3 years ago

If the magnitude of a charge is twice as much as another charge, but the force experienced is the same, then the electric field

Darina [25.2K]

Answer:

The new electric field strength of this charge is half of the strength of the other charge.

Explanation:

The electric force acting on the charge particle is given by :

F = q E

$E=\dfrac{F}{q}$

Where

q is the charged particle

E is the electric field

If the magnitude of a charge is twice as much as another charge, q' = 2q, but the force experienced is the same, then the new electric field is given by :

$E'=\dfrac{F}{q'}$

$E'=\dfrac{F}{(2q)}$

$E'=\dfrac{1}{2}\times \dfrac{F}{q}$

$E'=\dfrac{E}{2}$

So, the new electric field strength of this charge is half of the strength of the other charge. Hence, this is the required solution.

3 0

3 years ago