7. What is the force of air resistance on an
1 answer:
Answer:
C) 464 N
Explanation:
The equation of the forces acting on the skydiver is:
where
(mg) is the weight of the skydiver, acting downward, with
m being the mass of the skydiver
g is the acceleration of gravity
R is the air resistance, acting upward
a is the acceleration of the skydiver
In this problem:
m = 80 kg
g = 9.8 m/s^2
a = 4.0 m/s^2
Solving the equation for R, we find the force of air resistance:
You might be interested in
- initial velocity=u=0m/s
- Final velocity=v=25m/s
- Time=t=30s
Answer:
Velocity, V = 33.33 m/s
Explanation:
Given the following data;
Mass = 180grams to kilograms = 180/1000 = 0.18 kg
Kinetic energy = 100J
To find the speed;
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Substituting into the equation, we have;
100 = ½*0.18*V²
Cross-multiplying, we have;
200 = 0.18*V²
V² = 200/0.18
V² = 1111.11
Taking the square root of both sides, we have;
Velocity, V = 33.33 m/s