Answer: Frictional force
Explanation:
Since the body is moving at constant velocity, this means that the acceleration of the body is zero. Frictional force is a force of opposition which tends to oppose the moving force of an object on a flat surface.
Mathematically, summation of force on the car along the road will be
Fm - Ff = ma
Fm = moving force
Ff = frictional force
m = mass of the body
a = acceleration of the body
Since a = 0, we have;
Fm -Ff = 0
Fm = Ff (which shows that the two forces acting on the body are equal and opposite)
This frictional force will tend to keep the body at equilibrium.
12 N to the right (based on your POV)
Answer:
Frequency=0.39Hz
Explanation:
A pendulum completes 23 full cycles in 58 seconds
A pendulum completes 1 full cycle in 58/23=2.52 seconds
Time taken(t)=2.52 seconds
Now,
Frequency=1/time taken
Frequency=1/2.25
Frequency=0.39Hz
<span>equal-arm balance = 12 kg
spring scale = 2 kg
The equal arm balance measures the mass of an object by using a counter mass on the opposite plate of the balance. The force of gravity affects both the mass being tested and the mass standards being compared against equally. So if the local gravitational field changes, those changes affect both the tested mass and the standard masses equally.
Contrast that to the spring scale. In that scale, the spring provides a calibrated level of force irrespective of the local gravitational field. So if the local gravity is higher, the force indicated also is higher. And if the gravitational field is lower, the indicated force is also lower. The strength of the spring DOES NOT CHANGE with changes in the local gravitational field.</span>
