Motion in one dimension word problems

Front

What is average acceleration?

Back

Average acceleration is the change in velocity divided by the time over which the change occurs. It is calculated using the formula: a = (v_f - v_i) / t.

Front

How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken. Formula: Average Speed = Total Distance / Total Time.

Front

What is the formula for calculating final velocity?

Back

Final velocity can be calculated using the formula: v_f = v_i + (a * t), where v_i is initial velocity, a is acceleration, and t is time.

Front

If a runner decreases his velocity from 20 m/s to 10 m/s in 2.0 s, what is his average acceleration?

Back

-5 m/s².

Front

Jack travelled 360 km at an average speed of 80 km/h. How long did it take him?

Back

Time = Distance / Speed = 360 km / 80 km/h = 4.5 hours.

Front

What is the average speed of a journey if a fast camel travelled 180 miles in 4 hours and 156 miles in 3 hours?

Back

Average speed = Total Distance / Total Time = (180 + 156) miles / (4 + 3) hours = 48.5 miles/h.

Front

What is the average speed for Andy's journey if he took a bus for 1.6 hours at 15 km/h and walked for 0.4 hours at 4.5 km/h?

Back

Average speed = Total Distance / Total Time = (1.6 * 15 + 0.4 * 4.5) km / (1.6 + 0.4) hours = 12.9 km/h.

Front

What is the significance of negative acceleration?

Back

Negative acceleration, or deceleration, indicates that an object is slowing down.

Front

How do you convert km/h to m/s?

Back

To convert km/h to m/s, divide the speed by 3.6.

Front

What is the relationship between distance, speed, and time?

Back

Distance = Speed × Time. This relationship shows how distance traveled depends on speed and the duration of travel.