A car starts from rest and travels for 10.0 s with a uniform acceleration of +2.8 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.5 m/s2. If the brakes are applied for 2.0 s, determine each of the following. (a) How fast is the car going at the end of the braking period? m/s (b) How far has the car gone? m Need Help? Read It
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- A car starts from rest and travels for 7.0 s with a uniform acceleration of +2.6 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.5 m/s2. If the brakes are applied for 2.0 s, determine each of the following. (a) How fast is the car going at the end of the braking period? m/s (b) How far has the car gone? m Need Help? Read It MYΝΟTES ASK YOUR TEACHER A ball is thrown vertically upward with a speed of 40.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity when it returns to the level from which it started? m/sA record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.88 m/s2 for 19.0 s. 2. Maintain a constant velocity for the next 1.10 min. 3. Apply a constant negative acceleration of ?8.05 m/s2 for 6.80 s. (a) What was the total displacement for the trip? m (b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip?A record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.05 m/s² for 16.0 s. 2. Maintain a constant velocity for the next 1.80 min. 3. Apply a constant negative acceleration of -9.25 m/s² for 3.55 s. (a) What was the total displacement for the trip? m (b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip? leg 1 m/s leg 2 leg 3 complete trip m/s m/s m/s
- A record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.10 m/s² for 18.0 s. 2. Maintain a constant velocity for the next 1.50 min. 3. Apply a constant negative acceleration of -9.02 m/s² for 4.19 s. (a) What was the total displacement for the trip? m (b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip? leg 1 m/s leg 2 m/s leg 3 m/s complete trip m/sA car starts from rest and travels for 5.5 s with a uniform acceleration of +2.7 m/s2. The driver then applies the brakes, causing a uniform acceleration of -3.0 m/s2. If the brakes are applied for 2.0 s, determine each of the following. (a) How fast is the car going at the end of the braking period? m/s (b) How far has the car gone? mA record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.10 m/s2 for 11.0 s.2. Maintain a constant velocity for the next 2.60 min.3. Apply a constant negative acceleration of −9.18 m/s2 for 2.52 s. (a) What was the total displacement for the trip? ?m(b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip? leg 1 ?m/s leg 2 ?m/s leg 3 ?m/s complete trip ?m/s
- A car starts from rest and travels for 9.5 s with a uniform acceleration of +2.6 m/s. The driver then applies the brakes, causing a uniform acceleration of -2.5 m/s. If the brakes are applied for 2.0s, determine each of the following. (a) How fast is the car going at the end of the braking period? m/s Enter & number. (b) How far has the car gone? Gubmit AnswerA typical sneeze expels material at a maximum speed of 55.4 m/s. Suppose the material begins inside the nose at rest, 2.00 cm from the nostrils. It has a constant acceleration for the first 0.250 cm and then moves at constant velocity for the remainder of the distance. A) What is the acceleration as the material moves the first 0.250 cm? B) How long does it take to move the 2.00-cm distance in the nose? C) Which of the following is the correct graph of vx(t) if the sneeze expels material at a maximum speed of 44.0 m/s and has a constant acceleration for the first 0.250 cm and then moves at constant velocity for the remainder of the distance?Freight trains can produce only relatively small accelerations and decelerations. a) What is the final velocity of a freight train that accelerates at a rate of 0.0418 m/s² for 6 min, starting with an initial velocity of 3.22 m/s?
- A record of travel along a straight path is as follows:1. Start from rest with constant acceleration of 2.75 m/s2 for 16.0 s.2. Maintain a constant velocity for the next 2.90 min.3. Apply a constant negative acceleration of −9.27 m/s2 for 4.75 s.(a) What was the total displacement for the trip? m (b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip?leg 1 m/sleg 2 m/sleg 3 m/scomplete trip m/sA record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.05 m/s2 for 12.0 s.2. Maintain a constant velocity for the next 2.00 min.3. Apply a constant negative acceleration of −9.41 m/s2 for 2.61 s. (a) What was the total displacement for the trip? _ m(b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip? _ m (b) What were the average speeds for legs 1, 2, and 3 of the trip, as well as for the complete trip? leg 1 _ m/s leg 2 _ m/s leg 3 _ m/s complete trip _ m/sFor 10 seconds, a racer accelerates at a=5t+2t m/s2 after starting at rest. After that, the brakes are applied and the vehicle accelerates at a steady rate of a=-30 m/s2 until it comes to a stop. Calculate the maximum velocity.