Answer:
A
Since the car is moving to the right, the Normal Force is balancing the Weight and the Net Force is 10 N, right.
Explanation:
as the answers says, the only two forces in the y axis are the normal force and the weight, and they balance each other. On the x axis, you have 20N to the right and the friction is a force that opposes the movement, so the 10N are to the left. The net force is 20 - 10 = 10N.
Answer:
A
Explanation
i think its a not 100% sure though.
Answer:
time taken is equal to 14,156 years
Explanation:
we know,

at t = 0
Y(0) = A
given that half life of plutonium 239 = 24,200



hence time taken is equal to 14,156 years
Answer:
The electric field between the plates is 120 V/m.
(c) is correct option.
Explanation:
Given that,
Potential difference = 12 volt
Distance = 10 cm = 0.1 m
We need to calculate the electric field between the plates
Using formula of electric field

Where, V = potential difference
d = distance between the plates
Put the formula


Hence, The electric field between the plates is 120 V/m.
Answer:
Final speed, v = 28.81 m/s
Explanation:
Given that,
Mass of the car, m = 1423 kg
Initial speed of the car, u = 26.4 m/s
Force experience by the car, F = 901 N
Distance, d = 106 m
To find,
The speed of the car after traveling this distance.
Solution,
The force experienced by a car is equal to the product of mass and acceleration.




Let v is the final speed of the car. Using third equation of motion to find it as :



v = 28.81 m/s
So, the final speed of the car is 28.81 m/s.