Mdcat-past-papers - UHS - Physics Quiz

41. In velocity-time graph the area under graph is equal to the:

Speed of an object
Velocity of an object
Distance covered by object
Acceleration of an object

42. The distance traveled by a moving car with velocity 15 m/s in 2 s, decelerates at 2 m/s² is equal to:

30 m
16 m
34 m
26 m

43. Newton's first law of motion is also known as:

Law of inertia
Law of electromagnetism
Law of universal gravity
Law of conservation of momentum

44. A particle of mass m at rest is acted upon by a force F for time t. Its kinetic energy after time t is:

(P²t²)/m
(P²t²)/2m
(P²t²)/3m
(P²t²)/4m

45. An 8.0-kg box slides along a horizontal frictionless floor at 3 m/s and collides with a relatively massless spring that compresses 12 cm before the box comes to a rest. Calculate the retarding force of the spring.

3 N
300 N
30 N
3000 N

46. On which car is there a resultant force?

Car moving on a straight horizontal road
Car moving at constant speed around a bend
Car moving uphill at constant velocity
Car that is stationary

47. According to Newton's Law of Motion, the mass of an object is a quantitative measure of its:

Weight
Inertia
Speed
Acceleration

48. If two objects of equal masses "m" are moving towards each other with the same speed "v" then what will be the total final momentum after elastic head-on collision?

#NAME?
10 kg m/s
2mv kg's
0 kg m/s

49. A stone thrown horizontally from the top of a tall building follows a path that is:

Circular
Made of two straight line segments
Hyperbolic
Parabolic

50. If two equal masses are in motion with same individual speeds, we can conclude that:

Their momentum are same
Their momentum can be different
Their K.E are different
Their total energies are same

51. In an elastic collision the total kinetic energy:

Dissipates after collision
Increases after the collision
Reduces after the collision
Before and after collision remains the same

52. For projectile motion in absence of air resistance its

Vertical speed is constant
Horizontal force is constant
Horizontal acceleration is zero
Vertical acceleration is zero

53. The range of projectile motion depends upon velocity of the projection and angle of the projection i.e. 45° for a fixed velocity

Both height and range attained by projectile will be less
Both height and range attained by projectile will be more
Height attained will be less but range will be more
Height attained by projectile will be more but range less

54. Which of the following is incorrect?

Reaction force on a body is always balanced by the action force
Reaction and action forces are always equal
Action and reaction forces never act on the same body
Newton's third law is always valid in all situations

55. Ignoring details associated with friction, extra forces exerted by arm and leg muscles, and other factors, we can consider a pole vault as the conversion of an athlete's running kinetic energy into gravitational potential energy. If an athlete is to lift his body 5 m during vault, what speed must he have when he plants his pole?

5 m/s
10 m/s
15 m/s
20 m/s

56. The range of projectile will be maximum if the factor sin(2θ) becomes:

Zero
1
–1
2

57. The two-dimensional motion under constant acceleration due to gravity is called:

Circular Motion
Rotational Motion
Projectile Motion
Vibratory Motion

58. Work done will be zero if angle between force and displacement is:

0°
60°
270°
360°

59. The work done in figure is:

24 Nm
16 Nm
8 Nm
Zero Nm

60. The rate at which work is being done is:

Density
Force
Energy
Power