Answer:
a.After second Mr Comer's speed
b.Distance travelled by Mr.Comer in seconds
Explanation:
a. Lets recall our first equation of motion
Now we know that , and
Plugging the values we have.
Then Mr.Comer's speed after sec
b.
Lets find the distance and recall our third equation of motion.
So distance covered.
Dividing both sides with 2a we have.
Plugging the values.
So Mr.Comer will travel a distance of .
<span>speed is calculated by finding how much distance is traveled and in how much time, then divide the distance by the time ! :)</span>
The component that could Chang leave out and still light up the bulb is the switch.
Answer:
Explanation:
According to the Archimedes' Principle, the buoyant force exerted on the helium ballons is equal to the weight of displaced air. A simplified scheme for the system person-ballons is presented below. The correspondent equation of equilibrium is:
The minimum net volume is:
The volume of each ballon is:
The minimum quantity of ballons needed to lift Josiah is:
Answer:
Explanation:
hence making time the subject then
Substituting 50 cm which is equivalent to 0.5 m for distance and velocity as given as we obtain
From kinematic equation
and taking g as 9.81 then