Question

Which statement correctly defines displacement?
the maximum distance between the starting point and the ending point of a motion
the shortest distance between the starting point and the ending point of a motion
the maximum distance between the starting point and the ending point of a motion, measured in the direction of motion
the distance vector between the starting point and the ending point of a motion
the distance vector between the ending point and the starting point

Answer 1

shortest dist....ans

Answer 2

Thanks

A race car completes the final lap of a race on a 2-kilometer circular track. At the start of the lap, it crosses the line at 60 meters/second. It completes the lap 28.57 seconds later, crossing the line at 85 meters/second. Calculate the displacement and average acceleration of the car within the span of 12 seconds.
Displacement is 0 meters, and acceleration is 0.88 meters/second2.
Displacement is 2,000 meters, and acceleration is 1.14 meters/second2.
Displacement is 0 meters, and acceleration is 70.0 meters/second2.
Displacement is 2,000 meters, and acceleration is 80.0 meters/second2.
Displacement is 0 meters, and acceleration is 0.70 meters/second2.

Answer 3

A roller coaster car is loaded with passengers and has a mass of 500 kg along with a speed of 18 meters/second at the dip. The radius of curvature of the track at the bottom point of the dip is 12 meters (gravity = 9.8 meters/second2). What force is exerted on the roller coaster car by the track at the bottom of the dip?
1.6 × 104 newtons
1.8 × 104 newtons
0.5 × 104 newtons
1.0 × 104 newtons
8.6 × 103 newtons