1d kinematics HW quiz

Mary and Cory drive away from a red light at a constant 7.00 m/s². What is the velocity of their car 3.50 sec after leaving the red light?

• 2.00 m/s

• 24.5 m/s

• 15.6 m/s

• 45.0 m/s

A racecar can travel at a maximum velocity of 80.0 m/s. If a car travels at a constant acceleration from rest for 15 seconds, what is the acceleration of the car if it achieves maximum velocity at 15 seconds?

• 1.33 m/s²

• 2.00 m/s²

• 3.50 m/s²

• 5.33m/s²

A racing car reaches a speed of 35.0 m/s. At this instant, it begins a uniform negative acceleration, using a parachute and a braking system, and comes to rest 4.0 seconds later. How far did it take the car to come to a complete stop?

• 70.0 m

• 100.0 m

• 140.0 m

• 35.0 m

A bicyclist accelerates from 15.0 m/s to a velocity of 24 m/s in 7.00 seconds. Assuming constant acceleration, what is the displacement of the bicyclist during this time interval?

• 65.3 m

• 85.0m

• 56.0 m

• 137 m

While a baseball is being hit, its velocity changes from -25.0 m/s to 48.0 m/s in a time interval of 0.080 seconds. Assuming constant acceleration, what is the ball’s displacement during this time interval?

• 0.85 m

• 0.92 m

• 0.48 m

• 14.0 m

A car starts from rest and accelerates at 5.70 m/s/s for 6.2 seconds. What

was the cars displacement?

• 55.0 m

• 110 m

• 225 m

• 35.3 m

A skater reaches a speed of 15.0 m/s when he falls off his board, if he comes to a sliding stop after 3.2 m, what was his acceleration?

• -5.54 m/s²

• -10.6 m/s²

• -35.2 m/s²

• +3.45 m/s²

A plane lands at a speed of 80.0 m/s if the landing strip is 1300 m long what is the minimum acceleration the plane needs to stop?

• -1.34 m/s²

• -2.46 m/s²

• -3.59 m/s²

• -4.57 m/s²

A car moving at some speed accelerates for 5.7 seconds at 0.86 m/s/s, if the car had a displacement of 65.0 meters, what is the cars initial velocity?

• 5.45 m/s

• 8.95 m/s

• 10.4 m/s

• 12.4 ,/s

If a plane lands on a runway with a velocity of 265 km/h and can decelerate at negative 3.5m/s², how much time did it take for the plane to come to a stop?

• 14 s

• 33 s

• 21 s

• 76 s