Recent content by stephi

okay thanks! ill try that!

yes but no replies yet,.

thank you so much! is there any chance you could also help me with a math problem that is giving me lots of trouble?

both speed and velocity will be zero?! :)

thank you!

velocity has to have direction while speed does not.

Homework Statement Tara, driving at 30 m/s, enters a one-lane tunnel. She then observes Sean's slow moving van 155m ahead traveling at 5 m.s. Tara applies her brakes but can accelerate at only -2.00m/s/s because the road is wet. will there be a collision? if so, determine how far in the...

because when the ball reached maximum height, the ball stops and then changes direction, so then it would have v=0 and the top. but would the speed be 0 as well?

Homework Statement A football is kicked with a speed of 18 m/s at an angle of 65 degrees to the horizontal. What is the hang time of the football? Homework Equations The Attempt at a Solution i thought the answer was 1.66. but do i need to multiply that by 2 to get the full hang time?

Homework Statement A ball is thrown vertically in the air, upward from the surface of the Earth. Which of the following quantities are zero when the ball reaches maximum height? a)speed b)velocity c)acceleration Homework Equations The Attempt at a Solution i answered just b, but...