Download presentation

Presentation is loading. Please wait.

Published byKourtney Connard Modified over 3 years ago

1
Review Questions: Ch 2 A car starts from rest after 9 seconds is it moving at 81 m/s. What is the car’s acceleration? 81/9 = 9 m/s2

2
A car travels 8 meters in the first second, 8 meters in the second second, and 8 meters again during the thrid second. The acceleration is? 0 m/s2

3
**If a projectile is fired straight up at 60 m/s, the total time to return to its starting point is?**

12 seconds

4
Suppose a car is moving in a straight line and steadily increases its speed. It moves from 50 km/h to 55 km/hr in the first second and 55 km/hr to 60 km/hr in the second second. What’s the car’s acceleration? 5 km/h/s

5
**A car accelerates at 4 m/s2**

A car accelerates at 4 m/s2. Assuming the car starts from rest, how much time does it need to accelerate to a speed of 40 m/s? 10 s

6
Suppose you take a trip that covers 320 km and it takes you 4 hours to make. What is your average speed? 80 km/h

7
p. 26 # 26 Calculate the avg. speed of a cheetah that runs 140 meters in 5 seconds? 28 m/s

8
p. 26 # 27 Calculate the average speed of Charlie who runs to the store 4 km away in 30 minutes. 8 km/h

9
#28 Calculate the acceleration of a car that can go from rest to 100 km/h in 10 s 10 km/h/s

10
#29 Calculate the instantaneous speed at the 10-second mark for a car that accelerates at m/s2 from a position of rest. 20m/s

11
#30 Calculate the speed of a skateboarder who accelerates from rest for 3 seconds down a ramp at an acceleration of 5 m/s2 15 m/s

12
#31 Calculate the instantaneous speed of an apple that falls freely from rest position and accelerates at 10 m/s2 for 1.5 seconds 15 m/s

13
#32 An object is dropped from rest and falls freely. After 6 seconds, calculate its instantaneous speed, average speed, and distance fallen. Instantaneous speed=60 m/s Avg. speed = 0m/s + 60 m/s divided by 2 ---> 30 m/s Distance fallen =(1/2)gt2 5 (36) = 180m

14
Calculate the instantaneous speed and distance fallen for an object that falls freely from rest for 8 seconds Avg. speed = 80 m/s Dist. Fallen = 5 (64) 320 m

Similar presentations

Presentation is loading. Please wait....

OK

1. Motion of an object is described by its position,

1. Motion of an object is described by its position,

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on 3d tv without glasses Seminar report and ppt on cloud computing Ppt on game theory band Ppt on economic development Edit ppt on ipad 2 Ppt on lower bound theory Ppt on different kinds of birds Ppt on saas business model Ppt on kisan call centre Ppt on time management techniques