Take Tuition from the Best Tutors
Search in
Ask a Question
Post a LessonAnswered on 15/09/2018 Learn Motion in a Straight Line
Mandeep Kaur
Answered on 14/09/2018 Learn Motion in a Straight Line
Rohit Agnihotri
Professional Teacher
Answered on 14/09/2018 Learn Motion in a Straight Line
Abhishek Aman
Tutor
Both are in opposite direction,so consider one velocity in negative direction.
Velocity of jet w.r.t. ground Vjg= 500 km/h …...(Upward)
Velocity of products relative to jet VPJ = 1500 km/h …(downward)
Hence, velocity of products relative to ground = -1500+500
= -1000 km/h
Here – ve sign means downward .
read lessTake Tuition from the Best Tutors
Answered on 18/09/2018 Learn Motion in a Straight Line
Ayush Chaturvedi
Ayush
Answered on 15/09/2018 Learn Motion in a Straight Line
Vijay Giri
Tutor
Answered on 14/09/2018 Learn Motion in a Straight Line
Ambika Seetharaman
Tutor
Take Tuition from the Best Tutors
Answered on 14/09/2018 Learn Motion in a Straight Line
Anurag Mohapatra
Tutor
Speed of the belt, vB = 4 km/h
Speed of the boy, vb = 9 km/h
Since the boy is running in the same direction of the motion of the belt, his speed (as observed by the stationary observer) can be obtained as:
vbB = vb + vB = 9 + 4 = 13 km/h
Since the boy is running in the direction opposite to the direction of the motion of the belt, his speed (as observed by the stationary observer) can be obtained as:
vbB = vb + (-vB) = 9 – 4 = 5 km/h
Distance between the child’s parents = 50 m
As both parents are standing on the moving belt, the speed of the child in either direction as observed by the parents will remain the same i.e., 9 km/h = 2.5 m/s.
Hence, the time taken by the child to move towards one of his parents is .
If the motion is viewed by any one of the parents, answers obtained in (a) and (b) get altered. This is because the child and his parents are standing on the same belt and hence, are equally affected by the motion of the belt. Therefore, for both parents (irrespective of the direction of motion) the speed of the child remains the same i.e., 9 km/h.
For this reason, it can be concluded that the time taken by the child to reach any one of his parents remains unaltered.
read lessAnswered on 03/12/2018 Learn Motion in a Straight Line
Rajeshwari Mohanarangam
Home Tutor
Asked on 14/09/2018 Learn Motion in a Straight Line
On a two-lane road, car A is travelling with a speed of 36 km h-1. Two cars B and C approach car A in opposite directions with a speed of 54 km h-1 each. At a certain instant, when the distance AB is equal to AC, both being 1 km, B decides to overtake A before C does. What minimum acceleration of car B is required to avoid an accident?
read lessTake Tuition from the Best Tutors
Asked on 14/09/2018 Learn Motion in a Straight Line
Figure gives a speed-time graph of a particle in motion along a constant direction. Three equal intervals of time are shown. In which interval is the average acceleration greatest in magnitude? In which interval is the average speed greatest? Choosing the positive direction as the constant direction of motion, give the signs of v and a in the three intervals. What are the accelerations at the points A, B, C and D?
UrbanPro.com helps you to connect with the best Tuition in India. Post Your Requirement today and get connected.
Ask a Question
The best tutors for Tuition Classes are on UrbanPro
The best Tutors for Tuition Classes are on UrbanPro