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Accelerated Horizontal Motion Practice Problems -Round all Answers to one decimal place if needed -Include Units in your answer (seconds = s, meters =m meters per second = m/s and meters per second per second = m/s2 (use "shift + 6" then 2 for the square on m/s2) -Show all work in your notes, we will go over these before the exam -Keep questions for when we go over the answers -make sure if acceleration is negative that you include the sign in your answer What does it mean if an object has a constant acceleration in the horizontal direction? object is falling object's velocity is changing object is standing still object is speeding up How does velocity change when an object experiences uniform positive horizontal acceleration? slows down stands still moves away from you speeds up A car starts from rest and speeds up uniformly. What happens to the distance covered each second? does not change changes by a product of the acceleration decreases increases If acceleration is zero, what happens to an object’s velocity and position over time? velocity changes and position stays constant nothing changes velocity stays constant and position changes velocity and position continue to change Which of the following graphs represents constant acceleration: a) Linear velocity–time graph b) Curved displacement–time graph c) Constant slope displacement–time graph d) Both a and b A car accelerates uniformly from rest at a rate of 3.0 m/s2 for 5.0 s. a) What is its final velocity? b) How far does it travel? A motorcycle moving at 12m/s and speeds up uniformly at 2.0 m/s2 for 4.0s. Find its final velocity and total displacement. Velocity = Total Displacement = A sprinter accelerates from rest to 8.0m/s in 2.5s. What is the average acceleration? Use "shift + 6" then 2 for the square in m/s2 of acceleration units A car slows down uniformly from 25 m/s to 10 m/s in 3.0 s. What is the acceleration (include the sign + or -) and how far does the car travel while slowing? Distance traveled during slow down = Acceleration = Acceleration = Time needed to stop = A skateboarder moving at 5.0 m/s comes to rest after traveling 10.0m. Find the acceleration and time taken to stop.Include sign for acceleration if negative and units A train starts from rest and accelerates uniformly at 0.8m/s2 for 30s. Find: (a) its final velocity, and (b) the distance covered. Final Velocity = Distance Covered = A car traveling at 15 m/s accelerates to 25 m/s over 200 m. Determine the car’s acceleration. A runner accelerates uniformly at 1.5 m/s2 from rest. How long will it take her to travel 36 m? A truck moving at 20 m/s slows to a stop in 5.0 s. a) What is its acceleration? b) How far does it travel before stopping? Acceleration = Distance traveled before stopping = A car starts from rest and reaches a velocity of 30m/s in 10s. If the same acceleration continues, what velocity will it reach after 15s? A racing car moves with an initial velocity of 10m/s and accelerates at 2.5 m/s2 for 8.0s. Find its final velocity and the total displacement.-clue: must find final velocity first- A driver accelerates from 5.0 m/s to 25 m/s while covering 150 m. Calculate the acceleration and time taken. Acceleration = Time taken = A ball rolling along a smooth surface has a constant acceleration of 0.50 m/s2. If it starts at 1.0 m/s, how long until it travels 8.0m? Two cars are side by side.
A train uniformly accelerates from rest for 40s until it reaches 32 m/s, then continues at that speed for another 60 s. Find the total distance traveled during the 100s. |