Home › CBSE Class 11 (Science) › Physics › Motion in a Straight Line › Taking upward as positive, the acceleration of a…
Taking upward as positive, the acceleration of a falling stone is
Apositive and its speed falls
Bnegative and its speed increases
Czero and its speed is constant
Dpositive and its speed rises
Answer & Solution
Correct answer: B. negative and its speed increases
Gravity is downward, hence negative, and since velocity is also downward the speed increases.
Related questions
Which kind of motion did Domingo de Soto in 1545 correctly identify with uniformly accelerA cyclist moving at 10 m/s accelerates uniformly at 2 m/s^2 for 4 s. What is the final speHow many of the five SUVAT variables does each constant-acceleration equation of motion coA scooter starts from rest and reaches 20 m/s with a uniform acceleration of 5 m/s^2. WhatA train speeds up uniformly from 10 m/s to 30 m/s in 10 s. What is its acceleration?A bike moving at 20 m/s brakes with a uniform retardation of 4 m/s^2. How long does it takA car starts from rest and accelerates uniformly at 2 m/s^2 along a straight road. How farA body moves with constant velocity. Its acceleration is