WorksheetsGED SCI Topics 16-17
Total questions: 8
Worksheet time: 1hrs 20mins
Ramps, also called slopes or planes, make it easier to raise heavy loads. A ramp reduces the amount of work by increasing the distance that needs to be covered. The longer the plane, the easier the work. The mechanical advantage of a ramp is the length of the plane divided by the height.
A platform is 2.5 meters high. You need to take the 20-kilogram box to the top. But you are not strong enough to lift it that high.
QUESTION: How long a ramp do you need to give you a mechanical advantage of 5, so you can get the box to the top easily?
5 m
50 m
12.5 m
25 m
An object has a weight of 5.10 Newtons (N) at sea level, where acceleration due to gravity is 9.81 m/s2. What is the acceleration due to gravity on the object in a spaceship 1,000 km above sea level, where gravity exerts a force of 3.81 N on the object?
Formula: F (Newtons) = m (kg) x a (m/ s2)
1.33 m/s2
2.57 m/s2
7.33 m/s2
12.6 m/s2
If an airplane travels along a runway at the speed of 3 meters per second (3 m/s), how long does it take to travel 120 meters?
Formula: d = s • t (distance = speed multiplied by time)
A scientist was investigating if differences in the frictional work performed on a model car can change depending on its mass (in grams) and whether the car moves up or down an inclined plane. They decided to measure the amount of frictional force experienced by the model car and the distance it traveled in meters. The scientists were able to evaluate the frictional work using the following data.
It is known that the relationship between force and distance determines the work done by friction (Wf).
Formula: Wf = fd
Wf = work done by friction
f = force
d = distance
QUESTION: How much work done by friction was exerted on the car as it moved down the inclined plane? Fill the gap in the table by choosing an answer below.
2.547
9.005
11.46
16.16
Over the course of 3 minutes, the velocity of a jogger steadily decreases from 60 m/min to 42 m/min. Which statement best describes her change in velocity?
Her acceleration is -6 m/min^2.
Her acceleration is 18 m/min^2.
Her acceleration is 6 m/min^2.
Her acceleration is –18 m/min^2.
This is an image of a section of a roller coaster. What kind of energy is represented at the top of the roller coaster (W)?
kinetic
mechanical
potential
leverage
Work is a force acting on an object to move it across a distance. Inclined planes make work easier by providing a smooth surface for objects to slide or roll across. Pushing a stroller up a ramp is easier than pushing it up a fight of stairs. When going down a ramp, the gravitational pull on the stroller may be all that the stroller needs to begin rolling and gain velocity.
Thee velocity of a moving object can be determined by the following formula:
Velocity = Distance ÷ Time
The amount of kinetic energy a moving object has depends on its velocity and mass. Kinetic energy can be calculated by using the following formula:
Kinetic Energy = (mass × velocity2)÷2
Which of the following would have the most kinetic energy?
a truck driving 10 m/s
a bicycle traveling 10 m/s
a car stopped at a red light
a school bus parked on a hill
