Linear Motion
The units of acceleration are this.
m/s²
(meters per second squared)
What is the weight, in Newtons (N), of an object with a mass of 6kg?
60 N
Find the momentum of a 5.5kg cannonball traveling at 10 m/s.
55 kg m/s
A forklift raises a palette of bricks into the air, performing 10,000 J of work over 5 seconds. What power did the forklift perform?
2,000 W
The term for AVERAGE kinetic energy of an object is...
Temperature
The slope of a speed vs. time graph is this.
Velocity. (m/s)
If a net force on an object doubles, what happens to its acceleration?
It also doubles
Which has more momentum, a heavy truck moving at 30 miles per hour or a lighter car moving at 30 miles per hour?
The heavy truck
Calculate the work done by a force of 20N on a 5kg object to move it 10m in the direction of force.
200 J
Adding the same amount of heat to two different object of the same mass does not necessarily produce the same increase in temperature. Why not?
Specific heat capacity
OR
A phase change is happening in one object.
(but the test will expect specific heat capacity)
At an amusement park, the Star Blaster ride accelerates riders from rest straight into the air at 3m/s². After 3 seconds, what is the riders' final velocity?
9 m/s
A car drives at a constant velocity down the highway. What is the net force acting on the car?
0 N
A car with a mass of 1500 kg moves at 20 m/s. How much force will be required to stop the car in 6 seconds?
5000 N
If a moving object doubles its velocity, what happens to its Kinetic Energy?
The KE quadruples
(4*KE)
During the process of melting (example: ice to water), heat energy is continuously added to a substance, yet its temperature remains constant. Explain what happens to the added heat during melting, and why the temperature does not change.
something something adds to Potential Energy
An amusement park ride, the SlingShot, launches riders straight upwards into the air with an initial velocity of 9m/s. Find the time it takes the riders to reach their highest point.
0.9 seconds
A 550kg cannon fires a 5.5kg cannonball. The cannonball experiences a force of 5000N. How much force does the cannonball experience?
Also 5000N
A 30kg ball of clay moving at 11m/s hits and sticks to a 14kg ball initially at rest. What is the final velocity of the two balls after the collision?
7.5 m/s
A 5kg is dropped from a height of 30m. Give BOTH the Potential Energy the moment the rock drops, and the Kinetic Energy the moment right before the rock hits the ground.
They are both 1500 J
A 2.0 kg block of aluminum is heated, and its temperature increases by 10 ℃. How much heat energy, Q, was absorbed by the block? (specific heat capacity, c =900 J/(kg⋅℃))
18000 J
In the amusement park ride The Drop of Doom, riders are dropped from rest and allowed to free fall from a height of 17.55m.
How long does it take them to reach the ground?
about 1.87 seconds
A crane lifts a 4000 kg wrecking ball straight up. The ball accelerates upwards at 4m/s². Find the tension force exerted by the crane.
56000 N
In a head-on collision, airbags protect passengers from injury by reducing the force exerted to stop their head’s momentum. Referencing a formula from this unit, explain how/why this force is reduced.
Ft = △p
more time → less force (△p remains the same)
A 12kg pumpkin is launched straight into the air with an initial velocity of 15m/s. Find the maximum height the pumpkin reaches (you will need to use TWO formulas to help you solve this).
11.25 m
How much heat is required to turn 0.50 kg of boiling water at 89 ℃ completely into steam? The specific heat capacity of water (c) is 4186 J/kg℃, the latent heat of vaporization (Lv) of water is 2.26 x 106 J/kg, and the boiling point of water is 100℃. Give the EXACT answer.
1,153,023 J