1. An uniformly accelerated body travels a distance of 24 m in $(5^{\text{th}} )$ second of its motion and 44 m in $(15^{\text{th}} )$ sec of its motion. The acceleration of the particle will be
2. A body, starting with some velocity, experiences uniform acceleration. It travels a distance of 20 m in $(5^{\text{th}} )$ second and 36 m in $(9^{\text{th}} )$ second. The acceleration of the particle (in $(m/s^2) )$ is
3. A particle starts moving along a straight line with velocity ' $(u)$ ' and a constant acceleration ' $(a)$ ', the initial velocity is
4. A particle starts moving along a straight line with velocity ' $(u)$ ' and a constant acceleration ' $(a)$ ', the distance it travels in $(15^{\text{th}} )$ second is