Physics, 05.11.2020 06:00 HoodieHeem
8.) If a car moving at 50km/h skids 15m with locked brakes, how far does the same car moving at 100km/h
skid with locked brakes?
a. 15m
b. 30m
d. 120m
c. 60m
9.) A lever is used to lift a heavy load. When a 50N force pushes one end of the lever down 1.2m, the load
rises 0.12m. What is the approximate mass (not weight) of the load?
a. 50kg
c. 100kg
d. 500kg
b. 5kg
10.) A block and tackle is used to lift a tractor that weights 210,000N a distance of 10m above the ground. The
maximum force you are able to supply is about 700N. Assuming that you must use every bit of your maximum
force in lifting the tractor (i. e. the tractor begins to rise when you pull with 700N), what length of rope will you
have to pull?
Answers: 2
Physics, 22.06.2019 12:30
As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?
Answers: 1
8.) If a car moving at 50km/h skids 15m with locked brakes, how far does the same car moving at 100k...
Mathematics, 28.06.2019 00:00
Mathematics, 28.06.2019 00:00
Biology, 28.06.2019 00:00
Social Studies, 28.06.2019 00:00
Mathematics, 28.06.2019 00:00
History, 28.06.2019 00:00
Social Studies, 28.06.2019 00:00
Physics, 28.06.2019 00:00
Mathematics, 28.06.2019 00:00