I): Speed=Distance/Time
=65-30 km/12:30-12:00 hrs
=35 km/00:30hrs
=3500 m/1800 s
=1.94m/s

ii): Average Speed=Total Distance/Total Time
=100000 m/7200 s
=13.88 m/s

iii):No because it has different speeds at
different time intervals

5 0

3 years ago

Read 2 more answers

two objects each weighing 2kg are lifted through the same distance in 4s and 1s respectively. which scenario requires more work?

Shalnov [3]

i believe it would be the same because time doesn't matter when calculating total work done.

Work=FxD

F=force

D=distance

7 0

3 years ago

5. An infinite wire is 3.00 cm away from and parallel to a 10 cm long wire, and each has a current of 2.50 A in the same directi

Step2247 [10]

Answer:

B=1.04*10^{-4}T

Explanation:

An infinite wire produces a magnetic field that can be computed with the formula:

$B=\frac{\mu_0 I}{2\pi r}$

where m0 is the magnetic permeability of vacuum (4pi*10^{-7}Tm/A), I is the current of the wire (2.50A) and r is the perpendicular distance to the wire in which B is calculated (3cm=3*10^{-2}m). By replacing we obtain:

$B=\frac{(4\pi*10^{-7}Tm/A)(2.50A)}{3*10^{-2}m}=1.04*10^{-4}T$

hope this helps!!

3 0

3 years ago