No student devices needed. Know more
25 questions
EASY ROUND
This is a combination of horizontal motion caused by the velocity of projection and vertical motion caused by the earth’s gravitational pull.
free fall
air resistance
projectile motion
momentum
EASY ROUND
Consider a plane moving with a constant speed at an elevated height above the Earth’s surface. In the course of its flight, the plane drops a package from its luggage compartment. Where will it land with respect to the plane?
behind the plane
directly below the plane
in front of the plane
none of the above
EASY ROUND
What do you call the path of a projectile?
range
trajectory
maximum height
hyperbola
EASY ROUND
In the absence of air resistance, a projectile has its maximum range when fired at an angle of _____ with the ground.
30.0^{0}
45.0^{0}
60.0^{0}
75.0^{0}
EASY ROUND
Which quantity is NOT negative when an object is dropped from a cliff?
time
velocity
displacement
acceleration
EASY ROUND
An object is launched straight up into the air. When it reaches its maximum height, its velocity is ____.
equal to the acceleration
zero
equal to the product of displacement and time
equal to the quotient of displacement and time
EASY ROUND
A paper ball is thrown horizontally from the table. How will you describe the ball’s horizontal and vertical velocity at the start?
constant vertical and zero horizontal motion
constant horizontal and zero vertical velocity
constant vertical and horizontal velocity
zero vertical and horizontal velocity
EASY ROUND
What quantities are involved in the momentum of an object?
time and mass
velocity and acceleration
mass and time
mass and velocity
EASY ROUND
A bug splatters on the windshield of a moving car. Compared to the change in momentum of the car, the change in momentum of the bug is __________.
larger
smaller
equal to that of the car
none of the above
EASY ROUND
When a coaster car falls, the _______.
potential energy increases
kinetic energy decreases
kinetic energy decreases and potential energy increases
kinetic energy increases and potential energy decreases
AVERAGE ROUND
An object during its trajectory maintains a constant horizontal component? Why is this so?
The net force acting on the object is zero.
The object is not acted upon by any force.
The object is not acted upon by a force in the horizontal direction.
none of the above
AVERAGE ROUND
When NO air resistance acts on a projectile, its horizontal acceleration is ____.
zero
equal to gravity
upward
at right angle to gravity
AVERAGE ROUND
The horizontal and vertical components of an object are 16 m/s and 20.0 m/s respectively. How long does it take for the object to reach its highest point?
1.0 s
2.0 s
3.0 s
4.0 s
AVERAGE ROUND
A B C
B C A
C B A
C A B
A 150 kg object possesses 175 J of energy when its height from the ground is ____.
11 m
12 m
0.11 m
0.12 m
AVERAGE ROUND
In order to reduce the sting in catching a hard ball, one usually _____.
increases the contact time
increases the contact force
increased the impulse
increases the momentum change
AVERAGE ROUND
Air bags can save lives by _____.
decreasing the time of contact thus increasing the impact force
increasing the time of contact thus decreasing the impact force
decreasing the normal force of our body on the car
increasing the impact force of our body on the car
AVERAGE QUESTION
Given the general formula above, isolate the variable V_{1f}.
AVERAGE ROUND
If the force applied to move an object over a horizontal surface is at an angle with the direction of motion, the force that is doing the work on the object is _____.
horizontal component
vertical component
normal force
both horizontal and vertical component
AVERAGE ROUND
Inday insisted that she is more powerful than Dodong. To prove this, they were given a box of the same mass to be moved at the same displacement. Inday reached the target displacement at a shorter time than Dodong. Suppose they exerted the same amount of force to move the box, is the claim of Inday correct?
Yes
No
DIFFICULT ROUND
A ball is launched horizontally from the top of the cliff with an initial velocity of 20 m/s. What is its vertical velocity after 2 secs?
-10 m/s
10 m/s
-20 m/s
20 m/s
DIFFICULT ROUND
What will happen to an object’s kinetic energy when its mass remains constant and velocity is tripled?
kinetic energy will reduce by one- third
kinetic energy will be tripled
kinetic energy will be six times as large
kinetic energy will be nine times as large
DIFFICULT ROUND
A 10.0 kg sack of rice is resting on the shoulder of a boy. The distance between the sack and the ground is 1.0 m. Calculate the work done by the boy.
zero
10 N m/s
9.8 N m/s
98 Joules
DIFFICULT ROUND
A 1 500.0 kg truck traveling at 80.0 km/hr collides with a car of mass 1 000.0 kg traveling at 30.0 km/hr in the opposite direction. The two vehicles stick together after the collision. What is their final velocity after the collision?
-36 km/hr
-60 km/hr
36 km/hr
60 km/hr
DIFFICULT ROUND
Which of the following has the greatest kinetic energy? An object of mass_________.
4m and speed v
3m and speed 2v
2m and speed 3v
m and speed 4v
Explore all questions with a free account