STANDARD Physics Motion In A Plane Class 11 Questions

A cyclist moving on a circular track to radius 40 m completes half a revolution in 40 s. Its average velocity is

Rain is falling vertically with a speed of 30 m s⁻¹. A woman rides a bicycle with a speed of 12 m s⁻¹ in east to west direction. In which direction she should hold her umbrella?

A river is flowing from west to east with a speed 5 m s⁻¹. A swimmer can swim in still water at a speed of 10 m s⁻¹. If he wants to start from point A on south bank and reach opposite point B on north bank, in what direction should he swim?

A girl riding a bicycle with a speed of 5 ms⁻¹ towards north direction, observes rain falling vertically down. If she increases her speed to 10 ms⁻¹, rain appears to meet her at 45° to the vertical. What is the speed of the rain?

Which of the following is true regarding projectile motion?

A bomb is released by a horizontal flying aeroplane. The trajectory of the bomb is

In case of a projectile motion, what is the angle between the velocity and acceleration at the highest point?

If a body is projected with an angle θ to the horizontal, then

A hiker stands on the edge of a cliff 490 m above the ground and throws a stone horizontally with a speed of 15 m s⁻¹. The time taken by the stone to reach the ground is

In the previous question the speed with which the stone hits the ground is

A cricket ball is thrown at a speed of 30 m s⁻¹ in a direction 30° above the horizontal. The time taken by the ball to return to the same level is (Take g = 10 m s⁻²)

In the previous question, the distance from the thrower to the point where the ball returns to the same level is

An aeroplane flying horizontally with a speed of 360 km h⁻¹ releases a bomb at a height of 490 m from the ground. If g = 9.8 m s⁻², it will strike the ground at

A ball is thrown from the top of a tower with an initial velocity of 10 m s⁻² at an angle of 30° with the horizontal. If it hits the ground at a distance of 17.3 m from the base of the tower, the height of the tower is (Take g = 10 m s⁻²)