Answer:
a. a= 1.029 ms⁻²
b. S=25.89 m
Explanation:
given
initial speed is u = 7.30 m/sec
final speed is v = 0 m/sec
mu_k = 0.105
kinetic frictional force is Fk = mu_k×m×g
mu_k×m×g = m×a
m cancels
mu_k×g = a
deccelaration a = mu_k×g = 0.105×9.8 =1.029 ms⁻²
b) using v²-u² = 2aS
0²-7.3² = -2×1.029×S
53.29=2.058×S
S = 53.29/2.058
S=25.89 m
We have to use the equation speed=distance/time.
We want the average speed in second so we have to change the minutes into seconds. We can do this by multiplying the minutes by 60 (60seconds in 1 minute). 60x1.4= 84 seconds.
Speed=distance/time, distance is 82 and time is 84 so speed=82/84
Average speed = 0.98ms^-1 (2dp)
Answer:
The expression for the period of the pendulum is
T=2π√l/g
Explanation
Kindly find attached document for the analysis of the pendulum and the derivation for the period
What is a simple harmonic motion?
Simple harmonic motion is defined as the to and fro motion of an object or a particle whose acceleration is directly proportional to its displacement from a fixed point and is always directed towards that point.
I would say direction because force needs to be directed
