Answer:
-100000 N.
Explanation:
Force: This can be defined as the product of the mass of a body and it's acceleration. The S.I unit of Force is Newton(N). The Formula of force is given as,
F = ma ........................... Equation 1
Where F = Average force exerted on the car, m = mass of the car, acceleration of the car, a = acceleration of the car.
a = (v-u)/t..................... Equation 2
Where v = Final velocity, u = Initial velocity, t = time.
Substitute equation 2 into equation 1
F = m(v-u)/t............. Equation 3
Given: m = 1500 kg, u = 20 m/s, v = 0 m/s (brought to rest), t = 0.3 s.
Substitute into equation 3
F = 1500(0-20)/0.3
F = 1500(-20)/0.3
F = -100000 N.
Note: The negative sign is due to the fact that the force exerted on the car by the pole is equal and opposite the force of the car.
Answer:
Explanation:
Bulk modulus is defined as the relative change in the volume of a body produced by a unit of compressive acting uniformly over its surface:
Hence the density of the seawater at a depth of 680atm is calculated as:-
Answer:
12m
Explanation:
To obtain the answer to the question given, we must observe the characteristics of image formed by a plane mirror.
The image formed by a plane mirror have the following characteristics:
1. Laterally inverted.
2. Same distance as the object from the mirror.
3. Same height as the object.
4. Virtual.
With the above information, we can calculate the distance between the boy and his image as follow:
Initially:
Object distance (u) = 4m
Image distance (v) = 4m
The boy moved 2m away, therefore:
Object distance (u) = 2 + 4 = 6m
Image distanc(v) = 2 + 4 = 6m
The distance between the boy and his image will be the sum of his distance (u) and image distance (v) i.e (u + v)
The distance between the boy and his image = 6 + 6 = 12m
Therefore, the distance between the boy and his image is 12m.
To measure the fluids that you will be using such as water or other chemicals if your mixing them and they have to be precise measurements
Explanation:
For a circular orbit v= 
with G = 6.6742 × 
Given m = 6.42 x 10^23 kg and r=9.38 x 10^6 m
=> v = 2137.3 m/s
I hope this is the correct way to solve
