Instantaneous Velocity
Trending Questions
- v2∝gλρ
- v2∝gλ
- v2∝g−1λ−3
- v2∝λg−1ρ−1
- 30∘
- 45∘
- 60∘
- 90∘
- √158
- √140
- √148
- √144
- 1 ms−1, 7 ms−1
- 4 ms−1, 3 ms−1
- 2 ms−1, 5 ms−1
- 3 ms−1, 7 ms−1
The equation is the position of a particle in space at time . Find the​ particles velocity and acceleration vectors. Then write the​ particles velocity at equals as a product of its speed and direction. What is the velocity​ vector?
- 16 m/s
- 18 m/s
- 22 m/s
- 36 m/s
A rabbit runs across a parking lot on which a set of coordinate axes has, strangely enough, been drawn.
The coordinates (meters) of the rabbit's position as function of time t(seconds) are given by
x(t)=−t22+5t+20
And y(t)=t2−10t+30
Find the velocity at time t = 15s.
20^i+40^j
20^i+20^j
−10^i+20^j
−10^i+40^j
- 1 ms−1, 7 ms−1
- 4 ms−1, 3 ms−1
- 2 ms−1, 5 ms−1
- 3 ms−1, 7 ms−1
- α2β
- αβ
- 2αβ
- α4β
- 392
- 572
- 512
- 332
A particle moves on xy plane. Its position vector at any time t is →r={(2t)^i+(2t2)^j}m. The rate of change of θ at time t=2 second. (Where θ is the angle which its velocity vector makes with positive x-axis) is
217 rad/s
114 rad/s
47 rad/s
65 rad/s
- a
- b
- ∞
- 0
- 0 m/s
- 1 m/s
- 2 m/s
- 3 m/s
x(t)=5t+1
y(t)=t
The velocity of the body at t = 1 s is
- 2i + 4j
- i + j
- 5i + j
- None of these
- 2i + 3j
- –2i + 3j
- 2i – 3j
- –2i – 3j
(i) average velocity in the first 3 s, and
(ii) instantaneous velocity at t=3 s.
- 1 m/s, 7 m/s
- 4 m/s, 3 m/s
- 2 m/s, 5 m/s
- 3 m/s, 7 m/s