Recent content by rdmfresno

I figured out what I did wrong. I can't find the delete option.

Homework Statement A motorist drives for 35 minutes at 85km/h and then stops for 15.0 minutes. He then continues traveling 130km in 2 hours. a) What is his total displacement? b) What is his average velocity? Homework Equations v= ∆X/∆t (Change in displacement over change in time)...

Thanks a bunch. Will get started on the lesson.. then try the problem again.

Homework Statement A ball is thrown straight up with an initial speed of 30m/s, (a) Show that the time it takes to reach the top of its trajectory will be 3 seconds. (b) Show that it will reach a height of 45m (neglecting air resistance). Homework Equations Earth's gravity = 9.8 meter/second²...

Ty again! It's been awhile ;(

3. The Attempt at a Solution (a) speed = distance/time ? (b) 400m x 2 = 800m = diameter 800m x 3.14 = 2512 = distance 63m/s = 2512m/40s = 62.8m/s

Homework Statement A race car races on a circular racetrack of radius (r). (a) Write an equation for the car’s average speed when it travels a complete lap in time (t). (b) The radius of the track is 400m and the time to make a lap is 40s. Show that the average speed around the track is 63m/s...

I suppose I'm confused about the difference between speed/velocity. Time to read. Thanks a lot for the help!

speed = meters/time .. so just speed = distance/time.

1.0 meters per second?

Homework Statement 1. Lillian rides her bicycle along a straight road at an average velocity (v). (1)Write an equation showing how far she travels in time (t). (2) If Lillian’s average speed is 7.5m/s for a time of 5.0min, show that she travels a distance of 2300m. Homework Equations...