As ball is projected up in air at an angle of 45 degree without any air resistance
Let the initial speed will be v
now we will have 
In x direction

in y direction

now displacement in x direction

displacement in y direction

now from above two equations we have


so above equation is a quadratic equation and hence it will be a parabolic curve
so correct answer will be
<em>C. parabolic curve.</em>
 
        
             
        
        
        
Answer:
(1) V = 0.2 J (2) 0.05J 
Explanation:
Solution
Given that:
K = 160 N/m
x = 0.05 m
Now,
(1) we solve for the  initial potential energy stored
 Thus,
V = 1/2 kx² = 0.5 * 160 * (0.05)²
Therefore V = 0.2 J
(2)Now, we solve for how much of the internal energy is produced as the toy springs up to its maximum height.
By using the energy conversion, we have the following
ΔV = mgh 
=(0.1/9.8) * 9.8 * 1.5 = 0.15J
The internal energy = 0.2 -0.15
=0.05J
 
        
             
        
        
        
Answer:
 Newton's Second Law tells us that the more mass an object has, the more force is needed to move it. A larger rocket will need stronger forces (eg. more fuel) to make it accelerate. The space shuttles required seven pounds of fuel for every pound of payload they carry.
Explanation:
 
        
             
        
        
        
Answer:
from 
force =mass x acceleration 
mass = force/acceleration
m = f/a
m = 7.5/15
m=0.5kg
 
        
                    
             
        
        
        
Answer:
The object will travel at the speed of 16 m/s.
Explanation:
Given
To determine
How fast is the object traveling?
<u>Important Tip:</u>
The product of the mass and velocity of an object —  momentum. 
Using the formula

where
Thus, in order to determine the speed of the object, all we need to do is to substitute p = 64 and m = 4 in the formula


switch the equation

divide both sides by 4

simplify
 m/s
 m/s
Therefore, the object will travel at the speed of 16 m/s.