Science 9 : 4th quarter questions
Quiz by Liz Go
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- Q1
A body moves in a plane with constant acceleration in a direction from the initial velocity. The path of the body will be
an ellipse
a straight line
an arc of a circle
a parabola
30s - Q2
If you throw a baseball straight up, what is its vertical velocity at the highest point?
0 m/s
9.8 m/s
0 m/s2
-9.8 m/s2
30s - Q3
If a stone is horizontally launched at a certain height, how do you describe the magnitude of its vertical velocity as it approaches the ground?
Changes continuously
Remains the same
Gradually decreasing
Gradually increasing
30s - Q4
What is its acceleration when a horizontal force equal to its weight is applied to an object on a frictionless surface?
acceleration due to surface
acceleration due to force
acceleration due to gravity
acceleration due to friction
30s - Q5
Two objects are released from the same height. Object A falls straight down from a cliff, and object B follows a curved parabolic path. Which of the statements is true?
Object A hits the ground first if it is heavier than Object B
Object A hits the ground before Object B
both Objects A and B will hit the ground at the same time
Object B hits the ground before Object A
30s - Q6
What factor(s) affect (s) how far a projectile will land?
both angle of launch and initial velocity
none of the choices
initial velocity only
angle of launch only
30s - Q7
Consider a plane moving with constant speed at an elevated height above the Earth's surface. During its flight, the plane drops a package from its luggage compartment. where will the luggage land with respect to the plane.
None of the choices
Directly below the plane
Behind the plane
In front of the plane
30s - Q8
A baseball player throws a ball horizontally ( at an angle of 00). Which statements best describe the ball's motion after it is thrown? (Neglect air resistance)
its vertical speed remains the same, and its horizontal speed remains the same
its vertical speed increases and its horizontal speed remains the same
its vertical speed increases, and its horizontal speed increases
its vertical speed increases and its horizontal speed decreases
30s - Q9
Which has more momentum, a heavy truck moving at 30 kph or a light truck moving at 30kph, or a light truck moving at 30 kph?
cannot be determined
both have the same momentum
a heavy truck
light truck
30s - Q10
Two billiard balls approach each other at equal speed. If they collide in a perfectly elastic collision, what would be their velocities after collision?
different in magnitude and opposite in direction
zero
same in magnitude but opposite in direction
same in magnitude and direction
30s - Q11
Which of the following statements describes momentum?
It is the product of the body's mass and velocity
It is the sum of body's mass and acceleration
It is the product of body's mass and acceleration
It is the sum of body's mass and velocity
30s - Q12
What word can best describe the total momentum in an isolated system?
converted
lost
changed
conserved
30s - Q13
What is the momentum of two cars after a collision if its momentum before the collision is 50 kg m/s?
15 kgm/s
50 kgm/s
5 kgm/s
30 kgm/s
30s - Q14
The total mechanical energy of the object at the highest point compared to its total mechanical energy at the lowest point is _______.
not related
greater
equal
lesser
30s - Q15
Mechanical energy is defined as the sum of both the potential energy and the kinetic energy of an object. According to the law of conservation of energy, what happens to mechanical energy if the potential energy of an object decreases?
Mechanical energy increases
Mechanical energy increases then decreases
Mechanical energy remains unchanged
Mechanical energy decreases
30s