Experiment and explain finding resultant force of several forces on the same plane acting on objects.
Track each student's skills and progress in your Mastery dashboards
Give this quiz to my class
Q 1/20
Score 0
1. A construction worker uses a crowbar (first class lever) to lift a 1200 N crate. The effort arm is 2.5 m, and the load arm is 0.5 m. What effort force is needed?
30
200 N
480 N
240 N
600 N
Q 2/20
Score 0
2. A chef uses a nutcracker (second class lever) to crack a walnut. The effort arm is 15 cm, and the load arm is 5 cm. If the walnut resists with 90 N, how much effort is applied?
30
90 N
45 N
30 N
15 N
20 questions
Q.
1. A construction worker uses a crowbar (first class lever) to lift a 1200 N crate. The effort arm is 2.5 m, and the load arm is 0.5 m. What effort force is needed?
1
30 sec
SC8.FM.1
Q.
2. A chef uses a nutcracker (second class lever) to crack a walnut. The effort arm is 15 cm, and the load arm is 5 cm. If the walnut resists with 90 N, how much effort is applied?
2
30 sec
Q.
3. A firefighter uses a Halligan bar (first class lever) to pry open a door. If the MA is 4, and the load is 800 N, what effort is required?
3
30 sec
Q.
4. A skateboarder adjusts the trucks on their board, which act as a first class lever. If the effort arm is twice the load arm, what is the MA?
4
30 sec
Q.
5. A gardener uses a shovel (third class lever) to lift a 60 N rock. The effort arm is 0.4 m, and the load arm is 1.2 m. What effort is needed?
5
30 sec
Q.
6. A rower’s oar acts as a first class lever. If the effort arm (handle to fulcrum) is 3 m and the load arm (fulcrum to blade) is 1.5 m, what is the MA?
6
30 sec
Q.
7. A hospital uses tweezers (third class lever) to remove debris. If the MA is 0.4 and the load is 10 N, what effort is applied?
7
30 sec
Q.
8. A mechanic uses a wheel wrench (second class lever) to loosen a lug nut. The load arm is 0.1 m, and the effort arm is 0.5 m. What is the MA?
8
30 sec
Q.
9. A parent pushes a stroller (second class lever) with a 40 N effort. If the MA is 4, what load can be lifted?
9
30 sec
Q.
10. A baseball bat (third class lever) has an effort arm of 0.3 m and a load arm of 0.9 m. What is its MA?
10
30 sec
Q.
11. A farmer uses a pitchfork (third class lever) to toss hay. If the effort is 120 N and the MA is 0.25, what load is moved?
11
30 sec
Q.
12. A crane uses a first class lever system. If the MA is 3 and the load is 900 N, what effort is needed?
12
30 sec
Q.
13. A doorstop acts as a second class lever. If the effort arm is 0.2 m and the load arm is 0.05 m, what is the MA?
13
30 sec
Q.
14. A student uses a stapler (third class lever). If the effort arm is 5 cm and the load arm is 15 cm, what is the MA?
14
30 sec
Q.
15. A rock climber’s carabiner acts as a first class lever. If the effort arm is 0.8 m and the load arm is 0.4 m, what is the MA?
15
30 sec
Q.
16. A wheelbarrow (second class lever) carries a 300 N load. If the MA is 3, how much effort is needed?
16
30 sec
Q.
17. A fishing rod (third class lever) has an MA of 0.25. If the load is 20 N, what effort is applied?
17
30 sec
Q.
18. A seesaw (first class lever) balances two children: 200 N (2 m from fulcrum) and 250 N (distance = ?).
18
30 sec
Q.
19. A bottle opener (second class lever) requires 25 N of effort to remove a cap resisting 100 N. What is its MA?
19
30 sec
Q.
20. A broom (third class lever) has an MA of 0.5. If the effort is 40 N, what load is moved?
