Find the speed of the object after 4 seconds

  • #1
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Homework Statement


An object is thrown horizontally and after 3 seconds the speed vector forms the angle pi/4 radians with the horizontal direction. FInd the speed after 4 seconds.

Homework Equations


v=gt

The Attempt at a Solution


As it forms the angle pi/4 radians, vx=vy, so
v0=gt=3*10=30
vy when t=4 is 40m
v=sqrt(vx^2+vy^2)=50m Am I right
 

Answers and Replies

  • #2
cnh1995
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Homework Statement


An object is thrown horizontally and after 3 seconds the speed vector forms the angle pi/4 radians with the horizontal direction. FInd the speed after 4 seconds.

Homework Equations


v=gt

The Attempt at a Solution


As it forms the angle pi/4 radians, vx=vy, so
v0=gt=3*10=30
vy when t=4 is 40m
v=sqrt(vx^2+vy^2)=50m Am I right
Right.
 
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  • #3
haruspex
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