WorksheetsReview Quizizz
Total questions: 78
Worksheet time: 2hrs 34mins
completely described by a magnitude with a direction.
MagLev trains...cool, huh?). The fastest trains travel about 250 km in a half an hour. What is their
average speed in km/hour?
completely described by a magnitude with a direction.
MagLev trains...cool, huh?). The fastest trains travel about 250 km in a half an hour. What is their
average speed in km/hour?
for 8 s until it finally lifts off the ground.
Determine the velocity at take-off.
An airplane accelerates down a runway from rest at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
Which equation is appropriate?
vf=vi+a*t
x=vi*t+1/2at2
vf2=vi2+2aX
x=((vf+vi)/2)t
A car is traveling to the right with a speed of 29m/s when the rider slams on the accelerator to pass another car. The car passes in 110 m with constant acceleration and reaches a speed of 34m/s. We want to find the acceleration of the car as it sped up. What equation should you choose?
vf=vi+at
x=vit+1/2at2
vf2=vi2+2aX
x=((vf+vi)/2)t
A force of 8 Newton’s is applied to a crate so that it moves at a constant velocity of 1.5 m/s. What is the net force?
1.5 N
8 N
12N
0 N
A force of 8 Newton’s is applied to a crate so that it moves at a constant velocity of 1.5 m/s. What is the magnitude of the frictional force?
1.5 N
8 N
12N
0 N
Why is there no net force in the middle of this graph? This is F to t for an elevator.
There is. You can't trick me.
The elevator is at rest
The elevator is accelerating
The elevator has a constant speed
Is this object in equilibrium?
Yes and it's moving right
Yes and its at rest
No, it's accelerating right
No, it's at rest
Which of these is a correct sum statement for Fx?
Fa - Ff = ma
Fnet = Ff
Fn/Fg
Fa = ma
A 50.0 N box is at rest on a horizontal surface. The coefficient of static friction between the box and the surface is 0.50, and the coefficient of kinetic friction is 0.30. A horizontal 20.0 N force is then exerted on the box. The magnitude of the acceleration of the box is most nearly
0 m/s2
0.5 m/s2
1 m/s2
4 m/s2
An archer shoots an arrow straight up with a force of 24.5 N. The arrow has a mass of 0.4 kg. What is the force of gravity on the arrow?
9.8 m/s2
9.8 N
61.5 N
3.9 N
When the frictionless system shown above is accelerated by an applied force of magnitude F, the tension in the string between the blocks is
F
2/3 F
1/2 F
1/3 F
A block of weight W is pulled along a horizontal surface at constant speed v by a force F, which acts at an angle of Ө with the horizontal, as shown above. The normal force exerted on the block by the surface has magnitude
Greater than W
Greater than zero but less than W
Equal to W
zero
A block of mass 3m can move without friction on a horizontal table. The block is attached to another block of mass m by a cord that passes over a frictionless pulley, as shown above. If the masses of the cord and the pulley are negligible, what is the magnitude of the acceleration of the descending block?
g/3
g/4
2g/3
g
Two people are pulling on the ends of a rope. Each person pulls with a force of 100 N. The tension in the rope is
0 N
50 N
100 N
200 N
A cart travels with a constant nonzero acceleration along a straight line. Which graph best represents the relationship between the distance the cart travels and the time of travel?
The graph above represents the motion of a car during a 6 - second interval. What is the acceleration of the car at t = 5.0 s?
0.0 m/s
2.0 m/s
2.5 m/s
10 m/s
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This velocity vs. time graph shows an object...
(Hint: For this graph, the velocity is 0 m/s!)
not moving
moving with constant velocity
moving with changing velocity
This velocity vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
Two factors that determine work are...
Force
Mass
Velocity
Distance
Units of force are...
Newtons
Grams
Joules
Meters
Units of work are...
Newtons
Grams
Joules
Meters
If you push a cart with a force of 60 N for 2 m... how much work have you done?
120 J
30 J
120 N
30 N
Fred kicks a ball with a force of 20N to George, who is 5M away.
How much work was done to the ball?
25 J
100 J
4 J
75 J
If 40N of force is applied to Rollo Koster's 10 kg cart over a distance of 50 meters, how much work is done?
8000 J
8000 N
4000 J
2000 J
Complete the statement about the principal of Conservation of Energy.
Energy can be changed for one form to another but the total amount of energy
always increases
always decreases
does not change
varies according to the reaction
A Radio releases 250J of energy 10J is released as heat , How much is released as sound?
200J
220J
240J
260J
The % energy efficiency of an appliance is
total energy input/ useful energy output x 100
useful energy output /total energy input x100
total energy input x useful energy input x100
useful energy output /total energy input x50
A baguette is dropped off the top of the Eiffel Tower. What is true concerning of the mechanical energy of the ball as it falls?
The potential energy of the baguette is conserved as it falls.
The sum of the kinetic and potential energies of the baguette is a constant.
The kinetic energy of the baguette is conserved as it falls.
A) The total energy of the object increases as it falls since it gains speed.
In which of the following situations is kinetic energy decreasing?
A lit tinsel llama is dropped from a building.
A satellite is moving in a circular orbit around the moon.
A baseball is headed upward after being thrown up in the air.
An elevator is moving upward at a constant velocity.
A roller coaster car of mass m has a speed of 0 m/s just before it starts to go down a hill as show above. Assume the roller coaster does not encounter any friction or air resistance. What is the speed of the roller coast car at point B?
gh
2gh
2gh
m2gh
Renatta Gass is out with her friends. Misfortune occurs and Renatta and her friends find themselves getting a workout. They apply a cumulative force of 1080 N to push the car 218 m to the nearest fuel station. Determine the work done on the car.
2.35 x 105 J
2.05 x 105 J
1.35 x 105 J
3.25 x 105 J
Hans Full is pulling on a rope to drag his backpack to school across the ice. He pulls upwards and rightwards with a force of 22.9 Newtons at an angle of 35 degrees above the horizontal to drag his backpack a horizontal distance of 129 meters to the right. Determine the work (in Joules) done upon the backpack.
2.42 x 103 J
2.22 x 103 J
3.12 x 103 J
1.84 x 103 J
During the Powerhouse lab, Jerome runs up the stairs, elevating his 102 kg body a vertical distance of 2.29 meters in a time of 1.32 seconds at a constant speed. Determine the power generated by Jerome.
1.73 x 103 W
1.48 x 103 W
1.91 x 103 W
1.27 x 103 W
A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to exert an average force of 890 N to push large crates a distance of 12 meters in 22 seconds. Determine the power output required of such a motor.
490 Watts
40. Watts
11 x 103 Watts
0.55 Watts
