Answer:
Total time = 10.667 seconds
Explanation:
For the first 12m
V² = u² + 2as
10.5² = 0² + 2a(12)
110.25 = 24a
a = 4.59375 m/s²
V = u + at
10.5 = 0 + 4.59375t
t = 10.5/4.59375
t = 2.286 seconds
For the remaining race
100-12 = 88m
He travels at a constant speed for 88m
S = ut + 1/2(at²)
But a = 0
S = ut
88= 10.5t
t = 88/10.5
t = 8.38.seconds
Total time = 2.286 + 8.381
Total time = 10.667 seconds
Answer:
The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces, taking into account the fact that a force is a vector and two forces of equal magnitude and opposite direction will cancel each other out.
Off google not mine
Lab safety equipment prevents damage from accidents and helps keep the people working in the lab safe. The equipment goes hand in hand with the clothing of the person. The first step would be to wear closed shoes and a lab coat.
The equipment that must be worn are goggles to protect the eyes from irritants and latex gloves to protect the skin on the hands.
Answer:
1.5 km/s²
Explanation:
Given that:
a car starts from rest; it means the initial velocity (u) = 0 km/hr = 0 m/s
after time (t) = 20 seconds
the final velocity = 108 km/hr = 30 m/s
The acceleration (a) of the car can be determined by using the formula:
a = 1.5 km/s²
