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A particle has initial velocity (2i⃗+3j⃗) and acceleration (0.3i⃗+0.2j⃗). The magnitude of velocity after 10 seconds will be:
Options
(a) 9 √2 units
(b) 5 √2 units
(c) 5 units
(d) 9 units
Correct Answer:
5 √2 units
Explanation:
v⃗ = u⃗ + a⃗t
v = (2i + 3j) + (0.3i + 0.2j) x 10 = 5i +5j
| v⃗ | = √ (5² + 5²)
| v⃗ | = 5 √2
Related Questions: - In photoelectric effect, the photoelectric current
- Photoelectric current from a given photocell will depend upon
- A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth
- A pellet of mass 1 g is moving with an angular velocity of 1 rad/s along a circle
- Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial.
Difficulty Level: Easy
(1008)
Topics: Motion in Straight Line
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In photoelectric effect, the photoelectric current
- Photoelectric current from a given photocell will depend upon
- A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth
- A pellet of mass 1 g is moving with an angular velocity of 1 rad/s along a circle
- Two thin lenses of focal lengths f₁ and f₂ are in contact and coaxial.
Difficulty Level: Easy (1008)
Topics: Motion in Straight Line (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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