A truck on a straight road starts from rest, accelerating at 2.00ms2 until it reaches a speed of 13.0ms. Then the truck travels for 16.0s at a constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.00s? (a). How long is the truck in motion? (b). What is the average velority of the truck for the motion described?
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- A car traveling 56.0 km/h is 24.0 m from a barrier when the driver slams on the brakes. The car hits the barrier 2.00 s later. (a) What is the magnitude of the car’s constant acceleration before impact? (b) How fast is the car traveling at impact?From t = 0 to t = 4.59 min, a man stands still, and from t = 4.59 min to t = 9.18 min, he walks briskly in a straight line at a constant speed of 1.22 m/s. What are (a) his average velocity vavg and (b) his average acceleration aavg in the time interval 1.00 min to 5.59 min? What are (c) vavg and (d) aavg in the time interval 2.00 min to 6.59 min?A spaceship starts at rest, and then launches vertically into the air with an upward acceleration of 2.0 m/s2. When it reaches a height of 500 m, it runs out of fuel; after this point its acceleration is due to gravity, i.e. 9.8 m/s2 downward. (ignore air resistance)(a) How long does it take the spaceship to run out of fuel? (b) What is its velocity at the point when it runs out of fuel? (c) What is the maximum height that the spaceship reaches? (d) For how much time (total, from launch) is the rocket in the air? (e) What is the spaceship’s velocity just before it hits the ground?
- A ball of moist clay falls 17.7 m to the ground. It is in contact with the ground for 21.0 ms before stopping. (a) What is the average acceleration of the ball during the time it is in contact with the ground? (Treat the ball as a particle.) (b) Is the average acceleration up or down?A jogger accelerates from rest to 3.12 m/s in 3.52 s. A car accelerate from 22.2 to 39.7 m/s also in 3.52 s. (a) Find the magnitude of the acceleration of the jogger. (b) Determine the magnitude of the acceleration of the car. (c) How much futher does the car travel than the jogger during the 3.52 s?You drive a beat-up pickup truck down a straight road for 5.2 mi at 43 mi/h, at which point yourun out of fuel. You walk 1.2 mi farther, to the nearest gas station, in 27 min (= 0.450 h). What isyour average velocity from the time you started your truck to the time that you arrived at thestation?
- A person takes a trip, driving with a constant speed of 95.5 km/h, except for a 22.0-min rest stop. If the person's average speed is 70.8 km/h, find the following. (a) How much time is spent on the trip? (b) How far does the person travel? kmIn 1967, the New Zealander Burt Munro set the world speed record for an Indian motorcycle, on the Bonneville Salt Flats in Utah, reaching 183.58 mi/h. The one-way course was 5.00 mi long. Acceleration rates are often described by the time it takes to reach 60.0 mi/h from rest. Assuming that time was 4.5 s for Burt, if he accelerated at a constant rate until he reached his maximum speed, and then continued at that speed until the end of the course, how long, in seconds, did it take him to complete the course?A powerful motorcycle can accelerate from rest to 25.8 m/s (58 mi/h) in only 4.90 s. (For each answer, enter a number.) What is its average acceleration in m/s2? How far (in m) does it travel in that time?
- The brakes are applied to a moving van, causing it to uniformly slow down. While slowing, it moves a distance of 40.0 m in 8.20 s to a final velocity of 1.90 m/s, at which point the brakes are released. (a) What was its initial speed (in m/s), just before the brakes were applied? m/s (b) What was its acceleration (in m/s2) while the brakes were applied? (Assume the initial direction of motion is the positive direction. Indicate the direction with the sign of your answer.) m/s²On a dry road, a car with good tires may be able to brake with a constant deceleration of 3.92 m/s?. (a) How long does such a car, initially traveling at 29.9 m/s, take to stop? (b) How far does it travel in this time? (a) Number i Units (b) Number Units