AIEEE 2004 | Motion in a Straight Line Question 103 | Physics

An automobile travelling with speed of 60 km/h, can brake to stop within a distance of 20 m. If the car is going twice as fast, i.e 120 km/h, the stopping distance will be

60 m

40 m

20 m

80 m

AIEEE 2004

MCQ (Single Correct Answer)

-1

A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in $${T \over 3}$$ seconds?

$${{8h} \over 9}$$ meters from the ground

$${{7h} \over 9}$$ meters from the ground

$${h \over 9}$$ meters from the ground

$${{7h} \over {18}}$$ meters from the ground

AIEEE 2003

MCQ (Single Correct Answer)

-1

A car, moving with a speed of 50 km/hr, can be stopped by brakes after at least 6 m. If the same car is moving at a speed of 100 km/hr, the minimum stopping distance is

12 m

18 m

24 m

6 m

AIEEE 2003

MCQ (Single Correct Answer)

-1

The co-ordinates of a moving particle at any time 't' are given by x = $$\alpha $$t³ and y = βt³. The speed to the particle at time 't' is given by

$$3t\sqrt {{\alpha ^2} + {\beta ^2}} $$

$$3{t^2}\sqrt {{\alpha ^2} + {\beta ^2}} $$

$${t^2}\sqrt {{\alpha ^2} + {\beta ^2}} $$

$$\sqrt {{\alpha ^2} + {\beta ^2}} $$