Chapter 4
MOTION IN A PLANE
1. The motion of a rocket, physical quantity which is conserved is
Ans:- Lienier momentum
2. The resultant of two vectors has minimum magnitude. When the angle between them is
Ans:- 180°
( in opposit direction)
3. Which is the doesn't affect the maximum height attained by the projectile ?
Ans:- mass of the projectile
4. "A projectile has maximum value for time of flight when angle of projection is 45".state whether this statement true or false
Ans:-
False ,the maximum when 0= 90°
5. The relative velocity of particle moving with a velocity v .with respect to itself is
Ans:- zero
6. Two bullets are fired horizontally with different velocities from the same heights which will reach the ground first
Ans:- downward acceleration and velocity is same for both ,so both will reach simultaneously
7. The rectangular components of a force 5N in the following set is
a.1N,4N
b.2N,3N
c.4N,3N
Ans:- 4N,3N
8. Two force 4Nand 3N are acting perpendicular to each other .The magnitude of the resultent is
a. 7N
b. 5N
c 1N
Ans:- 5N
9. The path of a projectile is a
Ans:- Parabola
10. The methods for the addition for vectorsis known as
Ans:- parallelogram
11.Two bodies are
Moving in opposit direction with velocity v The relative velocity of one with respect to other is
Ans:- 2V
Relative velocity = V-(-V) =2V
12. The two particle Moving with velocities V1 and V2 There relative velocity is maximum .When the angle between
Theire velocities is
Ans:- Phy( particle moving opposite direction)
13. Define scalar quantity with example
Ans:- scalar quantities are quantities with magnitude only
Eg:- mass ,speed, distance, temperature
14.Define vector quantity with example
Ans:- vector quantities are quantities with magnitude and direction both
Eg:- displacement, velocity and acceleration
15. In a harbour ,wind is blowing at the speed of 72km/hour and the flag on the mast of a boat anchored in the harbour flutters along the N-E direction of the boat starts moving at a speed of 51 km/h to the north . What is the direction of the flag on mast of the boat ?
Ans:- East
MOTION IN A PLANE
1. The motion of a rocket, physical quantity which is conserved is
Ans:- Lienier momentum
2. The resultant of two vectors has minimum magnitude. When the angle between them is
Ans:- 180°
( in opposit direction)
3. Which is the doesn't affect the maximum height attained by the projectile ?
Ans:- mass of the projectile
4. "A projectile has maximum value for time of flight when angle of projection is 45".state whether this statement true or false
Ans:-
False ,the maximum when 0= 90°
5. The relative velocity of particle moving with a velocity v .with respect to itself is
Ans:- zero
6. Two bullets are fired horizontally with different velocities from the same heights which will reach the ground first
Ans:- downward acceleration and velocity is same for both ,so both will reach simultaneously
7. The rectangular components of a force 5N in the following set is
a.1N,4N
b.2N,3N
c.4N,3N
Ans:- 4N,3N
8. Two force 4Nand 3N are acting perpendicular to each other .The magnitude of the resultent is
a. 7N
b. 5N
c 1N
Ans:- 5N
9. The path of a projectile is a
Ans:- Parabola
10. The methods for the addition for vectorsis known as
Ans:- parallelogram
11.Two bodies are
Moving in opposit direction with velocity v The relative velocity of one with respect to other is
Ans:- 2V
Relative velocity = V-(-V) =2V
12. The two particle Moving with velocities V1 and V2 There relative velocity is maximum .When the angle between
Theire velocities is
Ans:- Phy( particle moving opposite direction)
13. Define scalar quantity with example
Ans:- scalar quantities are quantities with magnitude only
Eg:- mass ,speed, distance, temperature
14.Define vector quantity with example
Ans:- vector quantities are quantities with magnitude and direction both
Eg:- displacement, velocity and acceleration
15. In a harbour ,wind is blowing at the speed of 72km/hour and the flag on the mast of a boat anchored in the harbour flutters along the N-E direction of the boat starts moving at a speed of 51 km/h to the north . What is the direction of the flag on mast of the boat ?
Ans:- East
0 comments: