Laws of Motion Set 4

The one rupee coins are put on top of each other on a table. Each coin has a mass Which of the following statements is not true

There is a simple pendulum hanging from the ceiling of a lift. When the lift is stand still, the time period of the pendulum is . If the resultant acceleration becomes , then the new time period of the pendulum is

If two forces of each are acting along and axes, then the magnitude and direction of resultant is

A body of has an initial speed . A force acts on it for some time in the direction of motion. The force time graph is shown in figure. The final speed of the body

A stick of is moving with velocity of . What is the apparent length of the stick

The resultant of two forces and is . If the first force is doubled then the resultant is also doubled. The angle between the two forces is

Consider the following statement: When jumping from some height, you should bend your knees as you come to rest, instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement

Impulse is

A body of mass starts from the origin an initial velocity . If a constant force acts on the body, the time in which the component of the velocity becomes zero is

An object is kept on a smooth inclined plane of 1 in The horizontal acceleration to be imparted to the inclined plane so that the object is stationary relative to the inclined is