A motorcyclist heading east through a small town accelerates at a constant 4.0 m/s' after he leaves the city limits (Fig.). At time t-o he is 5.0 m east of the city-limits signpost, moving east at (a) Find his position and velocity at t=2.0 s (b) Where is he when his velocity is 25 m/s ? ,- 40 mk - 15 mfa steast) -5.0m -20

On a 200 km bike cycle ride, you ride the first 90 km at an average speed of 20 m/s. What mustyour average speed over the next 40 km be to have your average speed for the total 200 km be?(b) Given this average speed for the first 90 km, can you possibly attain an average speed of80 m/s for the total 200 km ride? Explain.

AS. Find the instantaneous velocity of the particle described in the right figure at the following times (m) 10 For t-05s, r-( 1 m's For t-255, e-(4 I ms For t44s, ( m/s For t-735, -( m/s

Calculate the displacement and velocity at times of (a) 0.500, (b) 1.00s, (c) 1.50s, and (d) 2.00s for a ball thrown straight up with an initial velocity of 15.0 m/s

Problem 5. An object is moving with an initial position of 28m from the origin with an initial velocity of -4m/s and constant acceleration of 8m/s². (1) How fast is the body moving after 2s? (2) What is its position 3s after the start? (3) When will it be 36m from the origin?

A car moving in a straight line accelerates from rest at a rate of 6.00 m/s², for 5.00 s. It then accelerates at a constant rate of -3.50 m/s², until it stops. The displacement during this time is m.

]=An inquisitive physics student and mountain climber climbs a 55.0-m-high cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of 2.20 m/s. (a) How long after release of the first stone do the two stones hit the water? s (b) What initial velocity must the second stone have if the two stones are to hit the water simultaneously? magnitude  m/s direction     (c) What is the speed of each stone at the instant the two stones hit the water? first stone  m/s second stone m/s

A ball is thrown directly downward with an initial speed of 8.70 m/s from a height of 30.4 m. After what time interval does it strike the ground? Need Help? Read It Watch It

A person walks first at a constant speed of 5.10 m/s along a straight line from point O to point ® and then back along the line from B to O at a constant speed of 2.80 m/s. (a) What is her average speed over the entire trip? m/s (b) What is her average velocity over the entire trip? m/s Need Heln? Read It Master It