Hey!
Formula for calculating work = Force × distance
Work done = Force applied on the object × distance travelled by it.
Hope it helps...!!!
Answer:
a) 4 s
b) 36 m/s²
c) 54 m
Explanation:
s = 2t³ – 24t + 6
a) Find t when v = 72 m/s.
v = ds/dt
v = 6t² – 24
72 = 6t² – 24
6t² = 96
t = 4
b) Find a when v = 30 m/s.
a = dv/dt
a = 12t
When v = 30:
30 = 6t² – 24
6t² = 54
t = 3
a = 36
c) Find Δs between t = 1 and t = 4
Δs = (2(4)³ – 24(4) + 6) – (2(1)³ – 24(1) + 6)
Δs = 38 – (-16)
Δs = 54
Explanation:
very different devices with different applications.
A motor and a generator are
similar devices.
only found in hybrid cars.
energy sources.
Because molecules in the air scatter blue light from the sun more than they scatter red light
Answer:
100N
Explanation:
Given parameters:
Mass = 20kg
Acceleration = 5m/s²
Unknown:
Force needed to cause the acceleration = ?
Solution:
According to Newton's second law of motion, force is the product of mass and acceleration.
Force = ma
m is the mass
a is the acceleration
Now insert the parameters and solve;
Force = 20 x 5 = 100N