A cart is rolling with a velocity of 4.8 m/s and an acceleration of -1.2 m/s2 . Describe the motion of the cart in words (without numbers) after a) 2 seconds b) 4 seconds and c) 6 seconds.
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A cart is rolling with a velocity of 4.8 m/s and an acceleration of -1.2 m/s2 . Describe the motion of the cart in words (without numbers) after a) 2 seconds b) 4 seconds and c) 6 seconds.
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- (Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) Scenes in films or television programs sometimes show people jumping off moving trains and having unpleasant encounters with the ground. If someone is on a moving flatbed train car and wishes to jump off, how could the person use the concept of relative speed to make a safer dismount?(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . As a car goes around a curve, the driver increases its speed. This means the car has two accelerations. What are the directions of these two accelerations?Describe your idea about PHYSICS IN MOTION in three to five sentences.
- a car drives for 1.36 hours at a speed of 61.2 miles per hour. What is the distance traveled in meters?A 3,500kg pickup truck is traveling eastward at a velocity of 15.0m/s when it collided into the rear of a 2,100kg car which is moving eastward at 9.00m/s. If the truck’s velocity decreased to 8.00m/s after the impact, what is the velocity of the car just after the collision?Sarah traveled 90 km at a certain speed. In going back, she increased her speed by 10 km/hr. If it took her a total of 10/3 hours, what was her original speed? Explain also. Create an expression to: Sarah traveled 90 km at a certain speed. Create another expression to: In going back, she increased her speed by 10 km/hr. Formula: v = d/t
- The velocity of a 40 kg object increases from 20 m/s to 30 m/s in 2 seconds. What is the acceleration of the object during these 2 seconds?What is the time it takes for a ball traveling at a constant velocity of 0.24 meters per second across a table measured at 4.0 meters.Bobby Gente drives a car that travels a distance of 540 km in 6.0 hours. How fast was bobby's car going.
- what was the average speed in meters per second of a race car that travels once every 8 seconds around a circular track that has a radius of 20 metersA research group at Dartmouth College has developed a Head Impact Telemetry (HIT) System that can be used to collect data about head accelerations during impacts on the playing field. The researchers observed 249,613 impacts from 423 football players at nine colleges and high schools and collected collision data from participants in other sports. The accelerations during most head impacts (>89%) in helmeted sports caused head accelerations less than a magnitude of 400 m/s2m/s2. However, a total of 11 concussions were diagnosed in players whose impacts caused accelerations between 600 and 1800 m/s2m/s2, with most of the 11 over 1000 m/s2m/s2. Find the average speed of the head while stopping. Suppose that the magnitude of the head velocity change was 14 m/sm/s. Express your answer with the appropriate unitsA research group at Dartmouth College has developed a Head Impact Telemetry (HIT) System that can be used to collect data about head accelerations during impacts on the playing field. The researchers observed 249,613 impacts from 423 football players at nine colleges and high schools and collected collision data from participants in other sports. The accelerations during most head impacts (>89%) in helmeted sports caused head accelerations less than a magnitude of 400 m/s2m/s2. However, a total of 11 concussions were diagnosed in players whose impacts caused accelerations between 600 and 1800 m/s2m/s2, with most of the 11 over 1000 m/s2m/s2 Suppose that the magnitude of the head velocity change was 13 m/sm/s. Find time interval for the collision which would produce a possible concussion with an acceleration of 1000 m/s2m/s2?
