Answer: Saving is important to the economic progress of a country because of its relation to investment. If there is to be an increase in productive wealth, some individuals must be willing to abstain from consuming their entire income.
Explanation:
Answer:
Explanation:
(a)
From the given information:
The initial velocity 
= 5 m/s
The direction of the angle θ = 30°
Therefore, the component along the x-axis = 
The component along the y-axis = 
To find the final velocity( reflected velocity)
using the same magnitude 
The angle from the x-axis can be 
= 150°
Thus, the component along the x-axis = 
The component along the y-axis = 
(b)
The velocity can be written as in vector form.
---- (1)
The reflected velocity in vector form can be computed as:
--- (2)
The change in velocity = 
(c)
The magnitude of change in velocity = 
= 8.66 m/s
Answer:
d = 105 m
Explanation:
Speed of a car, v = 21 m/s
We need to find the distance traveled by the dar during those 5 s before it stops. Let the distance is d. It can be calculated as :
d = v × t
d = 21 m/s × 5 s
d = 105 m
So, it will cover 105 m before it stops.
Answer:
Explanation:
True
It is correct as the total rotational energy is the sum of transnational kinetic energy of each small piece of the object.
Consider a rigid body made of small particles each of mass dm have same angular velocity ω and the radius of the rotational path is r.
The velocity of each particle is v = r ω
So, the kinetic energy of each particle is
dK = 0.5 dm x v² = 0.5 x dm x r² x ω²
The total kinetic energy
K = 0.5 x I ω²
where, I is the moment of inertia
Answer : The best pressure is 110 GPa of the lower mantle.
Explanation : We know that the pressure in the lower mantle starts at 24 GPa and reach a 136 GPa at the boundary.
So, the best pressure is 110 GPa because 220 GPa, a 305 GPa and 360 GPa are the higher value of the maximum value 136 GPa of the lower mantle.
