prettysexypie
Apr 23, 2012, 04:52 AM
( 1.) A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is not true?<
The passenger is in motion relative to the passer-by
The passer-by is stationery relative to the passenger
Both observers are in motion relative to each other
The passer-by is in motion relative to the passenger
( 2.) Which of the following statements is not correct about reference frames?
Laws of physics are invariant in inertial reference frames
In non-inertial reference frames the motion of objects depend only on the interactions of constituent particles among themselves
Any reference frame moving at constant velocity with respect to an inerial reference frame is also inertial
If the coordinate axes of a reference frame attached to an object remain fixed in space then the object is at rest
( 3.) What are the dimensions of power (time rate of change of expending energy)
( 5.) Two forces act on a point object as follows: 100N at 170derees and 100N at 50degrees. Find their resultant force
( 6.) Given three vectors a = -i-4j 2k, b = 3i 2j-2k, c = 2i-3j k, calculate a.(bxc)
( 7.) The resultant of vectors A and B has a magnitude of 20 units. A has a magnitude of 8 units, and the angle between A and B is 40degrees. Calculate the magnitude of B
( 8.) A man leaves the garrage in his house and drives to a neighbouring town which is twenty kilometres away from his house on sight-seeing. He returnes home to his garrage two hours after. What is his average velocity from home in Km/h?
( 9.) A monkey in a perch 20m high in a tree drops a coconut above the head of a zoo keeper as he runs with a speed 1.5m/s benaeth the tree. How far behind him in metres does the coconut hit the ground?
The passenger is in motion relative to the passer-by
The passer-by is stationery relative to the passenger
Both observers are in motion relative to each other
The passer-by is in motion relative to the passenger
( 2.) Which of the following statements is not correct about reference frames?
Laws of physics are invariant in inertial reference frames
In non-inertial reference frames the motion of objects depend only on the interactions of constituent particles among themselves
Any reference frame moving at constant velocity with respect to an inerial reference frame is also inertial
If the coordinate axes of a reference frame attached to an object remain fixed in space then the object is at rest
( 3.) What are the dimensions of power (time rate of change of expending energy)
( 5.) Two forces act on a point object as follows: 100N at 170derees and 100N at 50degrees. Find their resultant force
( 6.) Given three vectors a = -i-4j 2k, b = 3i 2j-2k, c = 2i-3j k, calculate a.(bxc)
( 7.) The resultant of vectors A and B has a magnitude of 20 units. A has a magnitude of 8 units, and the angle between A and B is 40degrees. Calculate the magnitude of B
( 8.) A man leaves the garrage in his house and drives to a neighbouring town which is twenty kilometres away from his house on sight-seeing. He returnes home to his garrage two hours after. What is his average velocity from home in Km/h?
( 9.) A monkey in a perch 20m high in a tree drops a coconut above the head of a zoo keeper as he runs with a speed 1.5m/s benaeth the tree. How far behind him in metres does the coconut hit the ground?