Laws of Motion Test

Result

Laws of Motion Test - 4

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Kepler's second law or the equal area law states that the closer a planet is to the sun the ________ it travels.

A
Faster

B
Slower

C
Higher

D
Lower

Solution

A planet's orbital speed changes, depending on how far it is from the Sun. The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun's gravitational pull, and the slower it moves in its orbit.
Question 2
1 / -0

A astronaut while trying to fix the technical fault in the ISS (International Space Station) slipped of the ledge and slowly begins to drift away from the space station. He has a great idea; he threw the 5 Kg tool box in the direction that he was traveling so that he might be able to drift back towards the space station. His action was,

A
Incorrect; as applying force in the direction of motion will increase the net force on the astronaut pushing him further in the space

B
Correct: by throwing the tool the astronaut exerts a force in the forward direction against the space which pushes the astronaut in the backward direction towards the space ship

C
Incorrect; the astronaut cannot exert force against the space as the space contains no matter.

D
The information provided in the question is inadequate.

Solution

As the astronaut throws the tool bag into the space, the astronaut exerts a force against the space which in turn exerts an equal and opposite force in the backward direction on the astronaut pushing the astronaut back towards the spaceship.
Question 3
1 / -0

A horse pulls the cart in the forward direction with a given force. According to the Newton’s third law, the cart must be pulling on the horse backward with an equal and opposite force. Given this, the cart must not move forward. What makes the cart and horse move forward?

A
The cart is rolling on the wheel while the horse is moving due to the traction offered by the track, and the two forces are acting on different bodies

B
For a brief moment the horse pulls the cart before the cart exert a reaction force.

C
The forward and the backward reaction forces are equal and are acting in opposite direction so the cart won’t move forward.

D
The forward forces exerted by the horse is greater than the reaction force exerted by the cart, therefore the cart will move forward.

Solution

According to the Newton’s third law, every force has equal and opposite reaction. Although, the forces are acting on different bodies. In this case, the horse is pushing against the ground which is pushing it back in forward direction (the friction is actually responsible for the forward push)