Question

help me pls science po Ito pls po​

Answer 1

Answer:

1. Distance travelled=120 km

Constant speed=60 kmph

$time \: taken = \frac{distance \: traveled}{average \: speed}$

= 120km×h /60 km=2 h.

Therefore, Time taken by Christian to reach his destination is 2 hours.

2. Here, a=0.5m/s^2, u=15 m/s, v=30m/s.

By the eqtion of motion v=u+at,

=>30=15+t/2

=> 15=t/2

=> t=15×2=30 s.

3.Here, v=10m/s, u=0m/s, t=20s.

Using the equation of motion v=u+at,

=>10 = 0+ a×20

=>10/20=a=1/2 m/s^2.

4. Total Distance=528 m

Total Time taken=4s

$average \: speed = \frac{total \: ditance}{total \: time}$

=>S=528/4= 132m/s.

5. Total Distance=50km

Total Time=1.5h=3/2 h

$average \: speed = \frac{total \: distance}{total \: time}$

=>S=50/(3/2)=100/3=33.333...

=>Acerage Speed = 33.33 m/s (approx.)

Hope it helps you (. ❛ ᴗ ❛.). Like and follow too ( ꈍᴗꈍ) ...