D) because the refrigerator was much heavier than the other objects
Acceleration of the car is 3.375 m/s² and the force of the car moving forward is 5062.5 N
Explanation:
- Acceleration is the rate of change of velocity.
- It is given by the equation, a = change in velocity/time
Here, velocity changes from 0 to 27 m/s and time = 8
⇒ Acceleration = 27 - 0/8 = 27/8 = 3.375 m/s²
- Force is calculated by the equation, F = Mass × Acceleration
- This is based on Newton's second law of motion.
Here, mass of the car = 1500 kg and a = 3.375 m/s²
⇒ Force = 1500 × 3.375 = 5062.5 N
Answer:
a)A= 3 m
b)
c)D= 15 m
Explanation:
Given that
v= 3 m/s
a)
The amplitude(A) of the pulse :
When x= 0 ,Then y = A
Put x= 0
y= A= 3 m
A= 3 m
b)
Distance travel in time t
x= vt
x= 3 t
c)
The distance covered by pulse in the time 5 s
D = v t
D= 3 x 5
D= 15 m
