F=ma
8480=26.5m
m=8480/26.5
m=320
The mass of the cart is 320kg.
Answer:
the last time i had my tempature taken was at disney prings about a week ago -_- they used one of those gun things that dont touch u and the SHOVED me forward so i guess i was fine
Explanation:
Answer:
After 1.938 sec velocity of rock will be 36 m/sec
Explanation:
We have given initial velocity at which rock is thrown u = 55 m/sec
Final velocity v = 36 m/sec
Acceleration due to gravity 
According to first equation of motion we know that
, here v is final velocity, u is initial velocity, g is acceleration due to gravity and t is time
So
( Negative sign is due to rock is thrown upward )
So 
t = 1.938 sec
So after 1.938 sec velocity of rock will be 36 m/sec