Understanding the basics of motion and acceleration

Question: John travels 250 miles to North but then back-tracks to South 105 miles to pick up a friend. What is john’s total displacement?

Question: Suppose a truck travels 60 kilometers in first hour and 80 kilometer in second hour. What is the average speed of Truck?

Question: An athlete ran a distance of 100 meters in 9.83 seconds. What was his average speed?

Question : What is the nature of the distance- time graphs for uniform and non-uniform motion of an object?

Question: If the displacement of the object is proportional to square of time, then object moves with

Question:  A car decreases its velocity from 80 km/hr to 60 km/hr in 5 sec. What is the acceleration of the car:

Question:  Starting from a rest position, John paddles his bicycle to achieve a velocity of 6 m/s in 30 sec. Then, he applies brakes such that the velocity of the bicycle decreases to 4m/s in the next 5 sec. What is the acceleration of the bicycle in both the cases.

Question: Anne, while driving to college, computes the average speed for her journey to be 20 km/hr. On her return trip along the same route, there is less traffic and the average speed is 30 km/hr . What is the average speed for Anne’s trip:

Question: Jack swims in a 90 m long pool. He covers 180 m in 1 minute in swimming from one end to the other and back along the same straight path.  What is the average velocity of jack:

Question: An athlete completes one round of a circular track of diameter 200 m in 40 sec. what will be the distance covered and the displacement at the end of 2 minutes 20 sec?

Question: The odometer of a car reads 2000 km at the start of a trip and 2400 km at the end of the trip. If the trip took 8 hour. What is the average speed of the car in Km/hr:

Question: A train starting from a railway junction and moving with uniform acceleration attains a speed of 40 km/hr in 10 minutes. Find its acceleration.

Question:A trolley, while going down an inclined plane, has an acceleration of 2 cm/sec². What will be its velocity 3 sec after the start?

Question: Under what condition is the magnitude of average velocity of an object is equals to its average speed?

Question: A body  is projected vertically upward with an initial velocity  30 m/sec. Its velocity after 2 sec is: