Examples were friction is not useful

What are data in physics

An astronaut has a mass of 74.0 kg. 1) how much would the astronaut weigh on mars where surface gravity is 38.0% of that on earth? (express your answer to three significant figures.)

Which activity involves using fossil fuels directly or indirectly? 1) eating fresh fruit for a snack 2) cooking hot dogs on a campfire 3) using crayons to color 4) walking to school

The material that is most difficult to recycle is

A hockey player uses her hockey stick to exert a force of 6.81 N on a stationary hockey puck. The hockey puck has a mass of 165 g. What is the acceleration of the hockey puck? a. 0.13 m/s2 b. 11.3 m/s2 c. 21.3 m/s2 d. 31.3 m/s2 e. 41.3 m/s2

What do we call it when an object exerts force on another for a short period of time? * Momentum Work Impulse Friction

The strength of the electric field 0.5 m from a 6 µC charge is positive N/C. (Use k = 8.99 * 109 N• and round answer to the nearest whole number.)

Which of the following equations correctly expresses the relation between vectors A⃗, B⃗, C⃗, and D⃗ shown in the figure?

Oliver, whose mass is 65 kg, and Olivia, whose mass is 45 kg, sit 2.0 m apart in the physics classroom. What is the force of gravitational attraction between Oliver and Olivia

Which is an application of radio waves? allow doctors to see inside a person's body carry information between cell phones sterilize surgical instruments reheat or cook food quickly and easily