CBSE - Motion

In which of the following graphs are both runners moving at the same speed? (1) Graph-C (2) Graph-A (3) Graph-D (4) Graph-B

The displacement-time graph for a body is given below. State whether the velocity and acceleration of the body in the region DE are positive , negative or Zero. (1) V= +v e but a=0 (2) V = -ve and a = -ve (3) V = + ve and a = + ve (4) V = +ve and a = -ve

A car accelerates uniformly from 18 km/h to 36km/ h in 5 s. The acceleration in ms –2 is - (1) 1 (2) 2 (3) 3 (4) 4

What is the speed of the object in the 10 second interv al from 40-50 seconds? (1) 2 m/s (2) 1 m/s (3) 0.25 m/s (4) 0.5 m/s