Question

in the figure below, according to Kelpler's laws of planetary motion
A. A3=A3
B. t3>43
C. if t1=t1, then the orbit is circular
D. if t1-t2,then A1=A2

2. how would the speed of Earth's orbit around the sun change if Earth's distance from the sun increased by 4 times?
A. it would increase by a factor of 2
B. it would increase by a factor of 4
C. it would decrease by a factor of 2
D. The speed would not change
3. a heavy bank-vault door is opened by the application of a force of 3.0 x 10^2 N directed perpendicular to the plane of the door at a distance of 0.80 m from the hinges. what is the torque?
A. 120 N*m
B. 240 N*m
C. 300 N*m
D. 360 N*m

4. A boy can raise a rock that weighs 95 N by using a lever and applying a force of 15 N. what is the mechanical advantages of the lever ?

5. what principle explains why lifting heavy objects is easier using ramps??

Answer 1

@Falco276 @GeckoBro @ganeshie8 @Preetha @skullpatrol @austinL @woohoo @Jonathan1997 @Jimboslice @javo22 @Hannnnah @KattGirl14 @LaceyLeanne
any one know this

Answer 2

figure for #1

Answer 3

@ns_5 @shortstuff15 @antoni7 @allopersonwhat @JustTooMuchh @LaceyLeanne @khadeeja @mathslover @PhysiquesOfGreatness

Answer 4

the only thing i know is how to add 45 plates and pick things up and put them down

Answer 5

i dont do physics sweetheart... sorry