Question 628026
The object has a speed of {{{ 10 }}} m/sec
when it's speed is first looked at.
1 second later it's speed is {{{ 10 + 3 = 13 }}} m/sec
After 2 seconds, it's speed is {{{ 13 + 3 = 16 }}} m/sec
After 3 seconds,  it's speed is {{{ 16 + 3 = 19 }}} m/sec
After 4 seconds, it's speed is {{{ 19 + 3 = 22 }}} m/sec