Answer:
The first 
Explanation:
Cause it will continue in motion till another force is applied
 
        
                    
             
        
        
        
The answer is true. I hope that this helps you out!!
        
             
        
        
        
Answer:
(a) 62.5 m 
(b) 7.14 s
Explanation:
initial speed, u = 35 m/s 
g = 9.8 m/s^2 
(a) Let the rocket raises upto height h and at maximum height the speed is zero. 
Use third equation of motion 


h = 62.5 m 
Thus, the rocket goes upto a height of 62.5 m. 
(b) Let the rocket takes time t to reach to maximum height. 
By use of first equation of motion 
v = u + at 
0 = 35 - 9.8 t 
t = 3.57 s 
The total time spent by the rocket in air = 2 t = 2 x 3.57 = 7.14 second.
 
        
             
        
        
        
Answer:
m = 35 g 
Explanation:
The specific heat of a material can be calculated by the following formula:

where,
C = Specific Heat of Wax = 220 J/g
Q = Amount of Heat Supplied by the Heater = 7700 J
m = mass of wax melted = ?
Therefore,

<u>m = 35 g </u>
 
        
             
        
        
        
Answer:
B.The box experiences less friction on the marble floor
Explanation: