Answered

Makakuha ng mabilis at tumpak na mga sagot sa iyong mga katanungan sa Imhr.ca, ang pinakamahusay na Q&A platform. Sumali sa aming Q&A platform at kumonekta sa mga propesyonal na handang magbigay ng eksaktong sagot sa iyong mga tanong. Kumonekta sa isang komunidad ng mga propesyonal na handang tumulong sa iyo na makahanap ng eksaktong solusyon sa iyong mga tanong nang mabilis at mahusay.

1. A car travels 40 km/h for 2.0 h, at 50 km/h for 1.0 h, and at 20 km/h for 0.50 h. What is the average speed of the car?

2. You run 100 m east in 12 s, then turn around and jog 50 m back toward the starCng point in 30s. Calculate your average velocity for the total trip.

3. A car is traveling with a velocity of 7200 meters per hour and speeds up to 16,200 meters per hour in just 5 seconds. What is the average acceleration of the car?

4. A plane flying at 60 m/s is uniformly accelerated at the rate of 3.0 m/s2. What is the distance it will travel during a 10s interval after the acceleration begins?

5. A grasshopper jumps straight upwards with a velocity of 10 m/s. How far did the grasshopper jump after 1.20 s?

Sagot :

plshelpmeonmodules

Answer:

40 km/h

Question 2:

Step 1: Calculate the total displacement:

Total displacement = 100 m (east) - 50 m (west)

Total displacement = 50 m (east)

Step 2: Calculate the total time taken for the trip:

Total time = 12 s + 30 s

Total time = 42 s

Step 3: Calculate the average velocity:

Average velocity = Total displacement / Total time

Average velocity = 50 m / 42 s

Average velocity ≈ 1.19 m/s east

Answer: 1.19 m/s east

Question 3:

Step 1: Calculate the change in velocity:

Change in velocity = Final velocity - Initial velocity

Change in velocity = 16200 m/h - 7200 m/h

Change in velocity = 9000 m/h

Step 2: Convert the change in velocity to m/s:

Change in velocity = 9000 m/h * (1 h / 3600 s)

Change in velocity = 2.5 m/s

Step 3: Calculate the average acceleration:

Average acceleration = Change in velocity / Time taken

Average acceleration = 2.5 m/s / 5 s

Average acceleration = 0.5 m/s^2

Answer: 0.5 m/s^2

Question 4:

Step 1: Calculate the final velocity after 10 seconds of acceleration:

Final velocity = Initial velocity + (Acceleration * Time)

Final velocity = 60 m/s + (3.0 m/s^2 * 10 s)

Final velocity = 60 m/s + 30 m/s

Final velocity = 90 m/s

Step 2: Calculate the distance traveled during the 10s interval:

Distance = Initial velocity * Time + 0.5 * Acceleration * Time^2

Distance = 60 m/s * 10 s + 0.5 * 3.0 m/s^2 * (10 s)^2

Distance = 600 m + 0.5 * 3.0 m/s^2 * 100 s^2

Distance = 600 m + 150 m

Distance = 750 m

Answer: 750 meters

Question 5:

Step 1: Calculate the displacement after 1.20 seconds:

Displacement = Initial velocity * Time + 0.5 * Acceleration * Time^2

Displacement = 10 m/s * 1.20 s + 0.5 * (-9.81 m/s^2) * (1.20 s)^2

Displacement = 12 m - 7.08 m

Displacement ≈ 4.92 m

Answer: 4.92 meters

Let's solve each problem step by step:

Question 1:

1Calculate the total distance traveled by the car:

Distance = (40 km/h * 2 h) + (50 km/h * 1 h) + (20 km/h * 0.50 h)

Distance = 80 km + 50 km + 10 km

Distance = 140 km

2Calculate the total time taken by the car:

Total time = 2 h + 1 h + 0.50 h

Total time = 3.50 h

3Calculate the average speed of the car:

Average speed = Total distance / Total time

Average speed = 140 km / 3.50 h

Average speed = 40 km/h

Explanation:

40 km/h

Question 2:

Step 1: Calculate the total displacement:

Total displacement = 100 m (east) - 50 m (west)

Total displacement = 50 m (east)

Step 2: Calculate the total time taken for the trip:

Total time = 12 s + 30 s

Total time = 42 s

Step 3: Calculate the average velocity:

Average velocity = Total displacement / Total time

Average velocity = 50 m / 42 s

Average velocity ≈ 1.19 m/s east

Answer: 1.19 m/s east

Question 3:

Step 1: Calculate the change in velocity:

Change in velocity = Final velocity - Initial velocity

Change in velocity = 16200 m/h - 7200 m/h

Change in velocity = 9000 m/h

Step 2: Convert the change in velocity to m/s:

Change in velocity = 9000 m/h * (1 h / 3600 s)

Change in velocity = 2.5 m/s

Step 3: Calculate the average acceleration:

Average acceleration = Change in velocity / Time taken

Average acceleration = 2.5 m/s / 5 s

Average acceleration = 0.5 m/s^2

Answer: 0.5 m/s^2

Question 4:

Step 1: Calculate the final velocity after 10 seconds of acceleration:

Final velocity = Initial velocity + (Acceleration * Time)

Final velocity = 60 m/s + (3.0 m/s^2 * 10 s)

Final velocity = 60 m/s + 30 m/s

Final velocity = 90 m/s

Step 2: Calculate the distance traveled during the 10s interval:

Distance = Initial velocity * Time + 0.5 * Acceleration * Time^2

Distance = 60 m/s * 10 s + 0.5 * 3.0 m/s^2 * (10 s)^2

Distance = 600 m + 0.5 * 3.0 m/s^2 * 100 s^2

Distance = 600 m + 150 m

Distance = 750 m

Answer: 750 meters

Question 5:

Step 1: Calculate the displacement after 1.20 seconds:

Displacement = Initial velocity * Time + 0.5 * Acceleration * Time^2

Displacement = 10 m/s * 1.20 s + 0.5 * (-9.81 m/s^2) * (1.20 s)^2

Displacement = 12 m - 7.08 m

Displacement ≈ 4.92 m

Answer: 4.92 meters

Let's solve each problem step by step:

Question 1:

1Calculate the total distance traveled by the car:

Distance = (40 km/h * 2 h) + (50 km/h * 1 h) + (20 km/h * 0.50 h)

Distance = 80 km + 50 km + 10 km

Distance = 140 km

2Calculate the total time taken by the car:

Total time = 2 h + 1 h + 0.50 h

Total time = 3.50 h

3Calculate the average speed of the car:

Average speed = Total distance / Total time

Average speed = 140 km / 3.50 h

Average speed = 40 km/h

Salamat sa iyong pagbisita. Kami ay nakatuon sa pagtulong sa iyong makahanap ng impormasyon na kailangan mo, anumang oras na kailangan mo ito. Pinahahalagahan namin ang iyong oras. Mangyaring bumalik anumang oras para sa pinakabagong impormasyon at mga sagot sa iyong mga tanong. Imhr.ca ay nandito para sa iyong mga katanungan. Huwag kalimutang bumalik para sa mga bagong sagot.