Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

A boy leaves his house at 9.30AM for his school. The school is 2 Km away and classes start at 10.00 Am. If he walks at a speed of 3 Km/hr for the first Km at what speed should he walk the second Km to reach just in time?
Asked by Ayushi Joshi | 31 May, 2013, 06:26: PM
answered-by-expert Expert Answer
distance = 2 km 
total time = 30 min = 0.5 hour
initial speed = 3km/h for first 1 km
Hence time taken = distance/speed = 1/3 h 
time left = 0.5 - 1/3 = 0.5/3 h
distance left = 1 km
 
Hence speed at which he should walk the second km wouldeb 1/(0.5/3) = 6 km/h
Answered by | 31 May, 2013, 08:06: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Physics
The average speed of a moving body can never be zero but the average velocity of a moving body can be zero. Justify.
Asked by mailtoparvathyprajith | 06 Feb, 2024, 09:50: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
  Arrange the following speeds in increasing order(keeping the least speed first): (i) An athlete running with a speed of 10m/s. (ii) An bicycle moving with a speed of 200m/min. (iii) An scooter moving with a speed of 30km/h
Asked by mailtoparvathyprajith | 06 Feb, 2024, 09:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
what is motion
Asked by kamalsonkar | 29 Jan, 2024, 11:31: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
when velocity becomes zero
Asked by sapnamantri05 | 24 Nov, 2023, 04:54: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
colliodal example
Asked by ashrithpandu84 | 09 Oct, 2023, 08:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
what is derivation
Asked by janhavisoni2099 | 02 Oct, 2023, 05:20: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
If mass of two object is same, than .. a) inertia will be same b) inertia will be different c) momentum will be same. d) momentum will be different
Asked by durgesh21332 | 06 Sep, 2023, 06:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
A body moving with uniform acceleration  travels 84m in 6seconds and 264m in 11seconds.  Find acceleration and initial velocity? (In detail)
Asked by sagrawal0081 | 18 Aug, 2023, 05:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
question 1) A body is projected vertically upwards from top of the tower with the velocity of 30m/s. if it takes 8sec to reach on ground then what is the height of the tower (g=10ms). what is the total distance travelled by the body. question 2) A body is dropped from the height of h covers by 64% distance in its last second.find out thte total tim of the ball and height. question 3) A body projected vertically upward, At the half  of its maximum height its velocity becomes 20m/s, what is the maximum height attained by the body. question 5) A body is projected vertically upward from ground. the time of flight is 8 sec find the velocity of projection.
Asked by ketkiparasgandhi | 05 Jul, 2023, 08:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Physics
define motion provide example of an object in motion  
question image
Asked by leena3732 | 15 Jun, 2023, 09:42: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×