Ask a question
Can't find the answer? Try online tutoring
We have the UK’s best selection of online tutors, when and for how long you need them.
Getting 1-on-1 support is cheaper than you might think.
A rope is used to pull a 55kg box along a rough, horizontal surface. The rope makes an angle of 30 deg. above the horizontal. If the box moves a dist. of 15m, and the tension in the rope is 102 N, how much work is done by the tension force on the box?
A track team is practicing for a 4 x 100 m relay race. The first runner, Linda, is running at a constant speed of 8.6 m/s. The next runner, Jenny, will be starting from rest at the 80 m mark. She has an acceleration of 1.0 m/s2. Ideally the two runners meet at the 100 m mark to hand over the baton. At this point, Jenny is still accelerating.
a) At what distance behind Jenny should Linda be when Jenny starts running? (Assume for simplicity that there is no distance between the two runners when the switch happens.)
b) How long does it take Jenny to run from the 80-m mark to the 100-m mark?
c) What’s Jenny’s speed at the 100m mark?
- Two cars are travelling on a straight stretch of highway at a steady 110 km/h in the same direction. Drivers are advised to maintain a separation of about 3 seconds between cars (more in poor road conditions). How far apart should the two cars be in meters (give you r answer to the nearest meter).
How does placing telescopes higher eg: in the mountains above weather systems make observing easier?
my question is- "A around wave of frequency 220 Hz travels along a steel bar. Its wavelength is 25 m. How fast is the wave travelling?"
my question is- "a ultrasound wave of frequency 20 KHz is send out from a submarine. Its wave length is 3 cm. find the speed of the wave in the water"
What equal lengths of iron wire and a lead wire, each of 1 mm diameter must be joined in parallel to give an equivalent resistance of 2 ohm ? Resistivity of iron and lead are 10 and 49 micro ohm-cm respectively.