Physics Vectors Level: High School
Three vectors A , B , C are such that A + B = C and A2 + B2 = C2 . Which of the following statement is correct .A and B are equal in magnitude
A and B are parallel
A is perpendicular to B
None of the listed
Physics Electromagnetic Waves Level: High School
The speed of light in vacuum is --------299, 792, 458 km/s
299, 792, 458 km/s
399, 462, 798 km/s
399, 462, 798 km/s
299, 792, 458 km/s
Physics Work,Power & Energy Level: High School
A 70 kg cart is pushed for 50 m with a constant velocity upon a 45 degree frictionless incline . Find the work done on the cart ( Assume g = 10 m/s2)2.5 x 105 J
2.5 x 106 J
2.5 x 104 J
4.0 x 104 J
Physics Work,Power & Energy Level: High School
A 100 kg object is pulled vertically upward 5 m by a rope with an acceleration of 1 m/s2 , Find the work done by the tension force in the rope . (Assume g = 10 m/s^2 )-5500 J
-5000 J
5500 J
5000 J
Physics Measurements Level: High School
The number of significant figures in 2.0060 x 10-15 m is -----5
2
1
4
Physics Force & Laws Of Motion Level: High School
Newton’s First Law
Newton’s first law is also known as the law of --------Inertia
Force
Acceleration
Velocity
Inertia
Physics Units Level: High School
The unit of force in the St system is ?Kg m2/s
Kg m/s
Kg m2/s2
Kg m/s2
Kg m/s2
Physics Kinematics Level: High School
Free Fall
An object , initially at rest , is dropped from a height of 20 m . What is the speed of the object when it hits the ground ? (Assume g = 10 m/s2)20 m/s
30 m/s
25 m/s
10 m/s
Physics Kinematics Level: High School
Circular Motion
An object is moving in a circular path of radius 1 m with a uniform speed of 1.0 x 106 m/s . The acceleration of the object has a magnitude of :0
1.0 x 1012 m/s2
1.0 x 103 m/s2
1.0 x 106 m/s2
Physics Work,Power & Energy Level: High School
Conservation of Energy
A 0.4 kg ball is thrown vertically upward with a speed of 30 m/s . The ball reaches a height of 40 m . Assuming g = 10 m/s^2 , the energy dissipated due to air friction is ?20 J
160 J
340 J
180 J
Physics Measurements Level: High School
A potential energy , U is calculated using the formula U = mgh , if m = 12 kg , g = 9.8 m/s^2 and h = 6.50 m , the potential energy U with the correct significant figures is ?764 kgm/s^2
760 kgm/s^2
764.4 kgm/s^2+
800 kgm/s^2
Physics Work,Power & Energy Level: High School
Elastic Potential Energy
A compressed spring that obeys Hooke’s law has a potential energy of 18 J . If the spring constant of the spring is 4 N/cm . find the distance by which the spring is compressed .0.3 m
0.3 cm
4.5 cm
3 m
Physics Vectors Level: High School
A force of magnitude 24 N makes an angle of 225 degree with the positive x axis . Find the x and y scalar components of the vector .-12 N , -12 N
24 N , 24 N
-24 N , 24 N
-24 N , -24 N
Physics Force & Laws Of Motion Level: High School
Newton’s Second Law
An elevator is moving downward with an acceleration of 2.0 m/s^2 . What is the force exerted on the elevator floor by a 75 kg person . (Assume g = 10 m/s2)900 N
750 N
150 N
600 N
Physics Waves And Oscillations Level: High School
Projectile Motion and Conservation of Linear Momentum
A 1.00 kg block of wood is sitting at the edge of a table , 1.00 meter above the ground . A 30.0 gram rifle bullet is fired horizontally across the table into the block of wood . where it lodges (ie , the bullet remains in the wood) , knocking it off the table . The block of wood lands 8.00 meters from the edge of the table . How fast was the rifle bullet going when it hit the block of wood ?