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# Kinematics Questions and Answers (Q&A)

L. Brett, Sales Manager
Correct answer is C - the 2 objects are traveling at the same speed.
Neglecting air resistance, an object thrown up has the same speed as the second object thrown down from the top of a...Read More

994 views
Jvoriana
Avg velocity =Δx/Δt
= (50-30)m/(30-10)s
= 20m/20s
∴ Ave Velocity = 1m/s (None in the choices given.)

475 views
Lloydlytle
20 meters
Units for acceleration should be expressed in m/s/s, not m/s.

269 views
John Smith
196 ft
2. 196.0 ft
3. 196 feet
4. 196.0 feet
Lloydlytle
14.14 meters
Shouldn't the answer be 30 m/s because that is the average of the final and starting velocities

253 views

How come the displacement is 14.14? I mean i do not understand that! Can anyone tell me?

252 views
The velocity increases up to a time , and then becomes constant

For time t < t0 velocity of particle = constant positive value for time t > t0 velocity = slope...Read More
John Smith
6.0 m

On 12s particle is at rest as y component of graph i.e. distance / displacement is constant . Hence , at this instant velocity remains zero.

243 views
Drtaylor
It will have the same acceleration, both up the hill and down the hill.
John Smith
1.25 m/s²

S = ut + &189 a t². With s= 40m, t = 4s and u = 7.5m/s, we get 40 = 7.54 + &189 a 44 ==> a =1.2m/s²
John Smith  